diff --git a/components/doc/multiselect/theming/tailwinddoc.js b/components/doc/multiselect/theming/tailwinddoc.js
index a50235bd1a..d9fb1d78aa 100644
--- a/components/doc/multiselect/theming/tailwinddoc.js
+++ b/components/doc/multiselect/theming/tailwinddoc.js
@@ -21,7 +21,7 @@ const Tailwind = {
     multiselect: {
         root: ({ props }) => ({
             className: classNames('inline-flex cursor-pointer select-none', 'bg-white dark:bg-gray-900 border border-gray-400 dark:border-blue-900/40  transition-colors duration-200 ease-in-out rounded-md', 'w-full md:w-80', {
-                'opacity-60 select-none pointer-events-none cursor-default': props?.disabled
+                'opacity-60 select-none pointer-events-none cursor-default': props.disabled
             })
         }),
         labelContainer: 'overflow-hidden flex flex-auto cursor-pointer',
@@ -47,18 +47,20 @@ const Tailwind = {
         headerCheckboxContainer: {
             className: classNames('inline-flex cursor-pointer select-none align-bottom relative', 'mr-2', 'w-6 h-6')
         },
-        headerCheckbox: ({ context }) => ({
-            className: classNames(
-                'flex items-center justify-center',
-                'border-2 w-6 h-6 text-gray-600 dark:text-white/70 rounded-lg transition-colors duration-200',
-                'hover:border-blue-500 focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]',
-                {
-                    'border-gray-300 dark:border-blue-900/40 bg-white dark:bg-gray-900': !context?.selected,
-                    'border-blue-500 bg-blue-500': context?.selected
-                }
-            )
-        }),
-        headercheckboxicon: 'w-4 h-4 transition-all duration-200 text-white text-base',
+        headerCheckbox: {
+            root: ({ props }) => ({
+                className: classNames(
+                    'flex items-center justify-center',
+                    'border-2 w-6 h-6 text-gray-600 dark:text-white/70 rounded-lg transition-colors duration-200',
+                    'hover:border-blue-500 focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]',
+                    {
+                        'border-gray-300 dark:border-blue-900/40 bg-white dark:bg-gray-900': !props?.checked,
+                        'border-blue-500 bg-blue-500': props?.checked
+                    }
+                )
+            })
+        },
+        headerCheckboxIcon: 'w-4 h-4 transition-all duration-200 text-white text-base',
         closeButton: {
             className: classNames(
                 'flex items-center justify-center overflow-hidden relative',
@@ -67,7 +69,7 @@ const Tailwind = {
                 'focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]'
             )
         },
-        closeButtonIcon: 'w-4 h-4 inline-block',
+        closeIcon: 'w-4 h-4 inline-block',
         wrapper: {
             className: classNames('max-h-[200px] overflow-auto', 'bg-white text-gray-700 border-0 rounded-md shadow-lg', 'dark:bg-gray-900 dark:text-white/80')
         },
@@ -89,17 +91,17 @@ const Tailwind = {
                 'border-2 w-6 h-6 text-gray-600 dark:text-white/80 rounded-lg transition-colors duration-200',
                 'hover:border-blue-500 focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]',
                 {
-                    'border-gray-300 dark:border-blue-900/40  bg-white dark:bg-gray-900': !context?.selected,
-                    'border-blue-500 bg-blue-500': context?.selected
+                    'border-gray-300 dark:border-blue-900/40  bg-white dark:bg-gray-900': !context.selected,
+                    'border-blue-500 bg-blue-500': context.selected
                 }
             )
         }),
-        checkboxicon: 'w-4 h-4 transition-all duration-200 text-white text-base',
-        itemgroup: {
+        checkboxIcon: 'w-4 h-4 transition-all duration-200 text-white text-base',
+        itemGroup: {
             className: classNames('m-0 p-3 text-gray-800 bg-white font-bold', 'dark:bg-gray-900 dark:text-white/80', 'cursor-auto')
         },
-        filtercontainer: 'relative',
-        filterinput: {
+        filterContainer: 'relative',
+        filterInput: {
             className: classNames(
                 'pr-7 -mr-7',
                 'w-full',
@@ -108,8 +110,8 @@ const Tailwind = {
                 'hover:border-blue-500 focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]'
             )
         },
-        filtericon: '-mt-2 absolute top-1/2',
-        clearicon: 'text-gray-500 right-12 -mt-2 absolute top-1/2',
+        filterIcon: '-mt-2 absolute top-1/2',
+        clearIcon: 'text-gray-500 right-12 -mt-2 absolute top-1/2',
         transition: TRANSITIONS.overlay
     }
 }
diff --git a/components/lib/multiselect/MultiSelectHeader.js b/components/lib/multiselect/MultiSelectHeader.js
index 3921b27679..262819c889 100644
--- a/components/lib/multiselect/MultiSelectHeader.js
+++ b/components/lib/multiselect/MultiSelectHeader.js
@@ -6,7 +6,7 @@ import { SearchIcon } from '../icons/search';
 import { TimesIcon } from '../icons/times';
 import { InputText } from '../inputtext/InputText';
 import { Ripple } from '../ripple/Ripple';
-import { IconUtils, ObjectUtils, UniqueComponentId, mergeProps } from '../utils/Utils';
+import { IconUtils, ObjectUtils, UniqueComponentId, classNames, mergeProps } from '../utils/Utils';
 
 export const MultiSelectHeader = React.memo((props) => {
     const { ptm, cx, isUnstyled } = props;
@@ -116,12 +116,19 @@ export const MultiSelectHeader = React.memo((props) => {
         getPTOptions('headerCheckboxIcon')
     );
 
+    const headerCheckboxContainerProps = mergeProps(
+        {
+            className: classNames('p-multiselect-select-all', cx('headerCheckboxContainer'))
+        },
+        getPTOptions('headerCheckboxContainer')
+    );
+
     const checkedIcon = props.itemCheckboxIcon || <CheckIcon {...headerCheckboxIconProps} />;
     const itemCheckboxIcon = IconUtils.getJSXIcon(checkedIcon, { ...headerCheckboxIconProps }, { selected: props.selected });
 
     const checkboxElement = props.showSelectAll && (
-        <div className="p-multiselect-select-all">
-            <Checkbox id={selectAllId} checked={props.selectAll} onChange={onSelectAll} role="checkbox" aria-checked={props.selectAll} icon={itemCheckboxIcon} pt={ptm('headercheckbox')} unstyled={isUnstyled()} />
+        <div {...headerCheckboxContainerProps}>
+            <Checkbox id={selectAllId} checked={props.selectAll} onChange={onSelectAll} role="checkbox" aria-checked={props.selectAll} icon={itemCheckboxIcon} pt={ptm('headerCheckbox')} unstyled={isUnstyled()} />
             {!props.filter && <label {...headerSelectAllLabelProps}>{props.selectAllLabel}</label>}
         </div>
     );
diff --git a/components/lib/multiselect/MultiSelectItem.js b/components/lib/multiselect/MultiSelectItem.js
index 9339c8694b..e2d8cedda9 100644
--- a/components/lib/multiselect/MultiSelectItem.js
+++ b/components/lib/multiselect/MultiSelectItem.js
@@ -4,13 +4,16 @@ import { Ripple } from '../ripple/Ripple';
 import { IconUtils, ObjectUtils, classNames, mergeProps } from '../utils/Utils';
 
 export const MultiSelectItem = React.memo((props) => {
+    const [focused, setFocused] = React.useState(false);
     const { ptm, cx } = props;
 
     const getPTOptions = (key) => {
         return ptm(key, {
             hostName: props.hostName,
             context: {
-                selected: props.selected
+                selected: props.selected,
+                disabled: props.disabled,
+                focused: focused
             }
         });
     };
@@ -36,6 +39,14 @@ export const MultiSelectItem = React.memo((props) => {
         }
     };
 
+    const onFocus = (event) => {
+        setFocused(true);
+    };
+
+    const onBlur = (event) => {
+        setFocused(false);
+    };
+
     const checkboxIconProps = mergeProps(
         {
             className: cx('checkboxIcon')
@@ -71,6 +82,8 @@ export const MultiSelectItem = React.memo((props) => {
             onClick: onClick,
             tabIndex: tabIndex,
             onKeyDown: onKeyDown,
+            onFocus: onFocus,
+            onBlur: onBlur,
             role: 'option',
             'aria-selected': props.selected,
             'data-p-highlight': props.selected,
diff --git a/components/lib/multiselect/multiselect.d.ts b/components/lib/multiselect/multiselect.d.ts
index 273b31037e..2b019a3f48 100644
--- a/components/lib/multiselect/multiselect.d.ts
+++ b/components/lib/multiselect/multiselect.d.ts
@@ -88,6 +88,10 @@ export interface MultiSelectPassThroughOptions {
      * Uses to pass attributes to the header's DOM element.
      */
     header?: MultiSelectPassThroughType<React.HTMLAttributes<HTMLDivElement>>;
+    /**
+     * Uses to pass attributes to the header checkbox's container DOM element.
+     */
+    headerCheckboxContainer?: MultiSelectPassThroughType<React.HTMLAttributes<HTMLDivElement>>;
     /**
      * Uses to pass attributes to the header checkbox's DOM element.
      */
@@ -120,6 +124,10 @@ export interface MultiSelectPassThroughOptions {
      * Uses to pass attributes to the close icon's DOM element.
      */
     closeIcon?: MultiSelectPassThroughType<React.SVGProps<SVGSVGElement> | React.HTMLAttributes<HTMLSpanElement>>;
+    /**
+     * Clear icon of the multiselect input.
+     */
+    clearIcon?: MultiSelectPassThroughType<React.SVGProps<SVGSVGElement> | React.HTMLAttributes<HTMLSpanElement>>;
     /**
      * Uses to pass attributes to the wrapper's DOM element.
      */
diff --git a/components/lib/passthrough/tailwind/index.js b/components/lib/passthrough/tailwind/index.js
index 51d35499bb..428b66464b 100644
--- a/components/lib/passthrough/tailwind/index.js
+++ b/components/lib/passthrough/tailwind/index.js
@@ -1313,18 +1313,20 @@ const Tailwind = {
         headerCheckboxContainer: {
             className: classNames('inline-flex cursor-pointer select-none align-bottom relative', 'mr-2', 'w-6 h-6')
         },
-        headerCheckbox: ({ context }) => ({
-            className: classNames(
-                'flex items-center justify-center',
-                'border-2 w-6 h-6 text-gray-600 dark:text-white/70 rounded-lg transition-colors duration-200',
-                'hover:border-blue-500 focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]',
-                {
-                    'border-gray-300 dark:border-blue-900/40 bg-white dark:bg-gray-900': !context.selected,
-                    'border-blue-500 bg-blue-500': context.selected
-                }
-            )
-        }),
-        headercheckboxicon: 'w-4 h-4 transition-all duration-200 text-white text-base',
+        headerCheckbox: {
+            root: ({ props }) => ({
+                className: classNames(
+                    'flex items-center justify-center',
+                    'border-2 w-6 h-6 text-gray-600 dark:text-white/70 rounded-lg transition-colors duration-200',
+                    'hover:border-blue-500 focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]',
+                    {
+                        'border-gray-300 dark:border-blue-900/40 bg-white dark:bg-gray-900': !props?.checked,
+                        'border-blue-500 bg-blue-500': props?.checked
+                    }
+                )
+            })
+        },
+        headerCheckboxIcon: 'w-4 h-4 transition-all duration-200 text-white text-base',
         closeButton: {
             className: classNames(
                 'flex items-center justify-center overflow-hidden relative',
@@ -1333,7 +1335,7 @@ const Tailwind = {
                 'focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]'
             )
         },
-        closeButtonIcon: 'w-4 h-4 inline-block',
+        closeIcon: 'w-4 h-4 inline-block',
         wrapper: {
             className: classNames('max-h-[200px] overflow-auto', 'bg-white text-gray-700 border-0 rounded-md shadow-lg', 'dark:bg-gray-900 dark:text-white/80')
         },
@@ -1360,12 +1362,12 @@ const Tailwind = {
                 }
             )
         }),
-        checkboxicon: 'w-4 h-4 transition-all duration-200 text-white text-base',
-        itemgroup: {
+        checkboxIcon: 'w-4 h-4 transition-all duration-200 text-white text-base',
+        itemGroup: {
             className: classNames('m-0 p-3 text-gray-800 bg-white font-bold', 'dark:bg-gray-900 dark:text-white/80', 'cursor-auto')
         },
-        filtercontainer: 'relative',
-        filterinput: {
+        filterContainer: 'relative',
+        filterInput: {
             className: classNames(
                 'pr-7 -mr-7',
                 'w-full',
@@ -1374,8 +1376,8 @@ const Tailwind = {
                 'hover:border-blue-500 focus:outline-none focus:outline-offset-0 focus:shadow-[0_0_0_0.2rem_rgba(191,219,254,1)] dark:focus:shadow-[0_0_0_0.2rem_rgba(147,197,253,0.5)]'
             )
         },
-        filtericon: '-mt-2 absolute top-1/2',
-        clearicon: 'text-gray-500 right-12 -mt-2 absolute top-1/2',
+        filterIcon: '-mt-2 absolute top-1/2',
+        clearIcon: 'text-gray-500 right-12 -mt-2 absolute top-1/2',
         transition: TRANSITIONS.overlay
     },
     multistatecheckbox: {