diff --git a/api-generator/components/multiselect.js b/api-generator/components/multiselect.js
index f8eb6130e2..9d8164b4c6 100644
--- a/api-generator/components/multiselect.js
+++ b/api-generator/components/multiselect.js
@@ -53,6 +53,18 @@ const MultiSelectProps = [
         default: 'null',
         description: 'Property name or getter function that refers to the children options of option group.'
     },
+    {
+        name: 'inline',
+        type: 'boolean',
+        default: 'false',
+        description: 'Render the items panel inline.'
+    },
+    {
+        name: 'flex',
+        type: 'boolean',
+        default: 'false',
+        description: 'Use flex layout for the items panel.'
+    },
     {
         name: 'style',
         type: 'string',
@@ -65,6 +77,12 @@ const MultiSelectProps = [
         default: 'null',
         description: 'Style class of the element.'
     },
+    {
+        name: 'itemClassName',
+        type: 'string',
+        default: 'null',
+        description: 'Style class of the items.'
+    },
     {
         name: 'panelClassName',
         type: 'string',
diff --git a/components/doc/multiselect/inlinedoc.js b/components/doc/multiselect/inlinedoc.js
new file mode 100644
index 0000000000..c51ab9c539
--- /dev/null
+++ b/components/doc/multiselect/inlinedoc.js
@@ -0,0 +1,105 @@
+import { useState } from 'react';
+import { MultiSelect } from '../../lib/multiselect/MultiSelect';
+import { DocSectionCode } from '../common/docsectioncode';
+import { DocSectionText } from '../common/docsectiontext';
+
+export function InlineDoc(props) {
+    const [selectedCities, setSelectedCities] = useState(null);
+    const cities = [
+        { label: 'New York', value: 'NY' },
+        { label: 'Rome', value: 'RM' },
+        { label: 'London', value: 'LDN' },
+        { label: 'Istanbul', value: 'IST' },
+        { label: 'Paris', value: 'PRS' }
+    ];
+
+    const code = {
+        basic: `
+<MultiSelect inline value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+<MultiSelect flex value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+<MultiSelect inline flex value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+<MultiSelect flex itemClassName="col-4" value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+<MultiSelect inline flex itemClassName="col-4" value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+        `,
+        javascript: `
+import { useState } from "react";
+import { MultiSelect } from 'primereact/multiselect';
+
+export default function InlineDoc() {
+    const [selectedCities, setSelectedCities] = useState(null);
+    const cities = [
+        { label: 'New York', value: 'NY' },
+        { label: 'Rome', value: 'RM' },
+        { label: 'London', value: 'LDN' },
+        { label: 'Istanbul', value: 'IST' },
+        { label: 'Paris', value: 'PRS' }
+    ];
+
+    return (
+        <MultiSelect inline value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+        <MultiSelect flex value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+        <MultiSelect inline flex value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+        <MultiSelect flex itemClassName="col-4" value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+        <MultiSelect inline flex itemClassName="col-4" value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+    );
+}
+        `,
+        typescript: `
+import { useState } from "react";
+import { MultiSelect, MultiSelectChangeParams } from 'primereact/multiselect';
+
+export default function InlineDoc() {
+    const [selectedCities, setSelectedCities] = useState<any>(null);
+    const cities = [
+        { label: 'New York', value: 'NY' },
+        { label: 'Rome', value: 'RM' },
+        { label: 'London', value: 'LDN' },
+        { label: 'Istanbul', value: 'IST' },
+        { label: 'Paris', value: 'PRS' }
+    ];
+
+    return (
+        <MultiSelect inline value={selectedCities} options={cities} onChange={(e : MultiSelectChangeParams) => setSelectedCities(e.value)} />
+        <MultiSelect flex value={selectedCities} options={cities} onChange={(e : MultiSelectChangeParams) => setSelectedCities(e.value)} />
+        <MultiSelect inline flex value={selectedCities} options={cities} onChange={(e : MultiSelectChangeParams) => setSelectedCities(e.value)} />
+        <MultiSelect flex itemClassName="col-4" value={selectedCities} options={cities} onChange={(e : MultiSelectChangeParams) => setSelectedCities(e.value)} />
+        <MultiSelect inline flex itemClassName="col-4" value={selectedCities} options={cities} onChange={(e : MultiSelectChangeParams) => setSelectedCities(e.value)} />
+    );
+}
+        `
+    };
+
+    return (
+        <>
+            <DocSectionText {...props}>
+                Set the property <i>inline</i> to true to display the items as inline panel. Set the property <i>flex</i> to true to use flex layout for the items panel. Use the property <i>itemClassName</i> to control the class of the items, for
+                example to display them with a fixed width.
+            </DocSectionText>
+            <div className="card flex justify-content-center gap-3">
+                <div>
+                    inline
+                    <MultiSelect inline value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+                </div>
+                <div>
+                    flex
+                    <br />
+                    <MultiSelect flex value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+                    <br />
+                    <br />
+                    inline + flex
+                    <MultiSelect inline flex value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+                </div>
+                <div>
+                    flex + itemClassName
+                    <br />
+                    <MultiSelect flex itemClassName="col-3" value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+                    <br />
+                    <br />
+                    inline + flex + itemClassName
+                    <MultiSelect inline flex itemClassName="col-3" value={selectedCities} options={cities} onChange={(e) => setSelectedCities(e.value)} />
+                </div>
+            </div>
+            <DocSectionCode code={code} />
+        </>
+    );
+}
diff --git a/components/lib/calendar/calendar.d.ts b/components/lib/calendar/calendar.d.ts
index 4b2935fc3c..9ef0d3ba40 100644
--- a/components/lib/calendar/calendar.d.ts
+++ b/components/lib/calendar/calendar.d.ts
@@ -11,15 +11,17 @@ type CalendarIconPosType = 'left' | 'right';
 
 type CalendarEventType = React.SyntheticEvent | undefined | null;
 
+type CalendarValueType = Date | Date[] | string | undefined | null;
+
 interface CalendarChangeTargetOptions {
     name: string;
     id: string;
-    value: Date | Date[] | undefined | null;
+    value: CalendarValueType;
 }
 
 interface CalendarChangeParams {
     originalEvent: React.SyntheticEvent;
-    value: Date | Date[] | undefined;
+    value: CalendarValueType;
     stopPropagation(): void;
     preventDefault(): void;
     target: CalendarChangeTargetOptions;
@@ -37,7 +39,7 @@ interface CalendarViewChangeParams {
 
 interface CalendarSelectParams {
     originalEvent: React.SyntheticEvent;
-    value: Date | Date[];
+    value: CalendarValueType;
 }
 
 interface CalendarDateTemplateParams {
@@ -131,7 +133,7 @@ export interface CalendarProps {
     tooltipOptions?: TooltipOptions;
     touchUI?: boolean;
     transitionOptions?: CSSTransitionProps;
-    value?: Date | Date[];
+    value?: CalendarValueType;
     view?: string;
     viewDate?: Date;
     visible?: boolean;
diff --git a/components/lib/multiselect/MultiSelect.css b/components/lib/multiselect/MultiSelect.css
index ea9fcc9be9..d759f23506 100644
--- a/components/lib/multiselect/MultiSelect.css
+++ b/components/lib/multiselect/MultiSelect.css
@@ -52,6 +52,22 @@
     left: 0;
 }
 
+.p-multiselect-inline.p-multiselect-panel {
+    border: none;
+    position: initial;
+    background: none;
+    box-shadow: none;
+}
+
+.p-multiselect-inline.p-multiselect-panel .p-multiselect-items {
+    padding: 0;
+}
+
+.p-multiselect-flex.p-multiselect-panel .p-multiselect-items {
+    display: flex;
+    flex-wrap: wrap;
+}
+
 .p-multiselect-items-wrapper {
     overflow: auto;
 }
diff --git a/components/lib/multiselect/MultiSelect.js b/components/lib/multiselect/MultiSelect.js
index a63524bbae..49ee1c26db 100644
--- a/components/lib/multiselect/MultiSelect.js
+++ b/components/lib/multiselect/MultiSelect.js
@@ -10,7 +10,7 @@ export const MultiSelect = React.memo(
     React.forwardRef((props, ref) => {
         const [filterState, setFilterState] = React.useState('');
         const [focusedState, setFocusedState] = React.useState(false);
-        const [overlayVisibleState, setOverlayVisibleState] = React.useState(false);
+        const [overlayVisibleState, setOverlayVisibleState] = React.useState(props.inline);
         const elementRef = React.useRef(null);
         const inputRef = React.useRef(props.inputRef);
         const labelRef = React.useRef(null);
@@ -113,7 +113,7 @@ export const MultiSelect = React.memo(
         };
 
         const onClick = (event) => {
-            if (!props.disabled && !isPanelClicked(event) && !DomHandler.hasClass(event.target, 'p-multiselect-token-icon') && !isClearClicked(event)) {
+            if (!props.inline && !props.disabled && !isPanelClicked(event) && !DomHandler.hasClass(event.target, 'p-multiselect-token-icon') && !isClearClicked(event)) {
                 overlayVisibleState ? hide() : show();
                 DomHandler.focus(inputRef.current);
                 event.preventDefault();
@@ -124,6 +124,8 @@ export const MultiSelect = React.memo(
             switch (event.which) {
                 //down
                 case 40:
+                    if (props.inline) break;
+
                     if (!overlayVisibleState && event.altKey) {
                         show();
                         event.preventDefault();
@@ -133,12 +135,14 @@ export const MultiSelect = React.memo(
 
                 //space
                 case 32:
+                    if (props.inline) break;
                     overlayVisibleState ? hide() : show();
                     event.preventDefault();
                     break;
 
                 //escape
                 case 27:
+                    if (props.inline) break;
                     hide();
                     break;
 
@@ -584,8 +588,8 @@ export const MultiSelect = React.memo(
             },
             props.className
         );
-        const label = createLabel();
-        const clearIcon = createClearIcon();
+        const label = !props.inline && createLabel();
+        const clearIcon = !props.inline && createClearIcon();
 
         return (
             <>
@@ -607,9 +611,13 @@ export const MultiSelect = React.memo(
                             {...ariaProps}
                         />
                     </div>
-                    {label}
-                    {clearIcon}
-                    <div className="p-multiselect-trigger">{IconUtils.getJSXIcon(props.dropdownIcon, { className: 'p-multiselect-trigger-icon p-c' }, { props })}</div>
+                    {!props.inline && (
+                        <>
+                            {label}
+                            {clearIcon}
+                            <div className="p-multiselect-trigger">{IconUtils.getJSXIcon(props.dropdownIcon, { className: 'p-multiselect-trigger-icon p-c' }, { props })}</div>
+                        </>
+                    )}
                     <MultiSelectPanel
                         ref={overlayRef}
                         visibleOptions={visibleOptions}
@@ -665,9 +673,12 @@ MultiSelect.defaultProps = {
     filterPlaceholder: null,
     filterTemplate: null,
     fixedPlaceholder: false,
+    flex: false,
     id: null,
+    inline: false,
     inputId: null,
     inputRef: null,
+    itemClassName: null,
     itemTemplate: null,
     maxSelectedLabels: null,
     name: null,
diff --git a/components/lib/multiselect/MultiSelectItem.js b/components/lib/multiselect/MultiSelectItem.js
index 41d0fc0abf..244d970c01 100644
--- a/components/lib/multiselect/MultiSelectItem.js
+++ b/components/lib/multiselect/MultiSelectItem.js
@@ -29,6 +29,7 @@ export const MultiSelectItem = React.memo((props) => {
             'p-highlight': props.selected,
             'p-disabled': props.disabled
         },
+        props.className,
         props.option.className
     );
     const checkboxClassName = classNames('p-checkbox-box', {
diff --git a/components/lib/multiselect/MultiSelectPanel.js b/components/lib/multiselect/MultiSelectPanel.js
index f0eaad6d26..9bb1df3b5c 100644
--- a/components/lib/multiselect/MultiSelectPanel.js
+++ b/components/lib/multiselect/MultiSelectPanel.js
@@ -84,6 +84,7 @@ export const MultiSelectPanel = React.memo(
                         onKeyDown={props.onOptionKeyDown}
                         tabIndex={tabIndex}
                         disabled={disabled}
+                        className={props.itemClassName}
                     />
                 );
             });
@@ -130,6 +131,7 @@ export const MultiSelectPanel = React.memo(
                         onKeyDown={props.onOptionKeyDown}
                         tabIndex={tabIndex}
                         disabled={disabled}
+                        className={props.itemClassName}
                     />
                 );
             }
@@ -188,6 +190,8 @@ export const MultiSelectPanel = React.memo(
             const panelClassName = classNames(
                 'p-multiselect-panel p-component',
                 {
+                    'p-multiselect-inline': props.inline,
+                    'p-multiselect-flex': props.flex,
                     'p-multiselect-limited': !allowOptionSelect
                 },
                 props.panelClassName
@@ -196,6 +200,15 @@ export const MultiSelectPanel = React.memo(
             const content = createContent();
             const footer = createFooter();
 
+            if (props.inline) {
+                return (
+                    <div ref={ref} className={panelClassName} style={props.panelStyle} onClick={props.onClick}>
+                        {content}
+                        {footer}
+                    </div>
+                );
+            }
+
             return (
                 <CSSTransition
                     nodeRef={ref}
@@ -220,6 +233,8 @@ export const MultiSelectPanel = React.memo(
 
         const element = createElement();
 
+        if (props.inline) return element;
+
         return <Portal element={element} appendTo={props.appendTo} />;
     })
 );
diff --git a/components/lib/multiselect/multiselect.d.ts b/components/lib/multiselect/multiselect.d.ts
index e9c58d3707..2362516b45 100755
--- a/components/lib/multiselect/multiselect.d.ts
+++ b/components/lib/multiselect/multiselect.d.ts
@@ -86,8 +86,11 @@ export interface MultiSelectProps extends Omit<React.DetailedHTMLProps<React.Inp
     optionGroupChildren?: string;
     optionGroupTemplate?: MultiSelectOptionGroupTemplateType;
     display?: MultiSelectDisplayType;
+    inline?: boolean;
+    flex?: boolean;
     style?: React.CSSProperties;
     className?: string;
+    itemClassName?: string;
     panelClassName?: string;
     panelStyle?: React.CSSProperties;
     virtualScrollerOptions?: VirtualScrollerProps;
diff --git a/pages/multiselect/index.js b/pages/multiselect/index.js
index 1eb59f6287..db0fa7e1c4 100644
--- a/pages/multiselect/index.js
+++ b/pages/multiselect/index.js
@@ -6,6 +6,7 @@ import { ApiDoc } from '../../components/doc/multiselect/apidoc';
 import { ImportDoc } from '../../components/doc/multiselect/importdoc';
 import { BasicDoc } from '../../components/doc/multiselect/basicdoc';
 import { ChipsDoc } from '../../components/doc/multiselect/chipsdoc';
+import { InlineDoc } from '../../components/doc/multiselect/inlinedoc';
 import { GroupedDoc } from '../../components/doc/multiselect/groupeddoc';
 import { AdvancedDoc } from '../../components/doc/multiselect/advanceddoc';
 import { VirtualDoc } from '../../components/doc/multiselect/virtualdoc';
@@ -23,6 +24,11 @@ const MultiSelectDemo = () => {
             label: 'Basic',
             component: BasicDoc
         },
+        {
+            id: 'inline',
+            label: 'Inline, flex, itemClassName',
+            component: InlineDoc
+        },
         {
             id: 'chips',
             label: 'Chips',