diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e0613a..ab42a58 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -43,6 +43,7 @@
 - New #58: Add `setStickerPositionInSet`, `setStickerEmojiList`, `setStickerKeywords` and `setStickerMaskPosition`
   methods.
 - New #60: Add `setStickerSetTitle` method.
+- New #61: Add `setStickerSetThumbnail` method.
 - Chg #24: Move update methods to `Vjik\TelegramBot\Api\Method\Update` namespace, and update types to
   `Vjik\TelegramBot\Api\Type\Update` namespace.
 - Chg #30: Remove `TelegramRequestWithFilesInterface`.
diff --git a/src/Method/Sticker/SetStickerSetThumbnail.php b/src/Method/Sticker/SetStickerSetThumbnail.php
new file mode 100644
index 0000000..e86135d
--- /dev/null
+++ b/src/Method/Sticker/SetStickerSetThumbnail.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Vjik\TelegramBot\Api\Method\Sticker;
+
+use Vjik\TelegramBot\Api\ParseResult\ValueHelper;
+use Vjik\TelegramBot\Api\Request\HttpMethod;
+use Vjik\TelegramBot\Api\Request\TelegramRequestWithResultPreparingInterface;
+use Vjik\TelegramBot\Api\Type\InputFile;
+
+/**
+ * @see https://core.telegram.org/bots/api#setstickersetthumbnail
+ */
+final readonly class SetStickerSetThumbnail implements TelegramRequestWithResultPreparingInterface
+{
+    public function __construct(
+        private string $name,
+        private int $userId,
+        private string $format,
+        private InputFile|string|null $thumbnail = null,
+    ) {
+    }
+
+    public function getHttpMethod(): HttpMethod
+    {
+        return HttpMethod::POST;
+    }
+
+    public function getApiMethod(): string
+    {
+        return 'setStickerSetThumbnail';
+    }
+
+    public function getData(): array
+    {
+        return array_filter(
+            [
+                'name' => $this->name,
+                'user_id' => $this->userId,
+                'thumbnail' => $this->thumbnail,
+                'format' => $this->format,
+            ],
+            static fn(mixed $value): bool => $value !== null,
+        );
+    }
+
+    public function prepareResult(mixed $result): true
+    {
+        ValueHelper::assertTrueResult($result);
+        return $result;
+    }
+}
diff --git a/src/TelegramBotApi.php b/src/TelegramBotApi.php
index 564b09a..36049c2 100644
--- a/src/TelegramBotApi.php
+++ b/src/TelegramBotApi.php
@@ -79,6 +79,7 @@
 use Vjik\TelegramBot\Api\Method\Sticker\SetStickerKeywords;
 use Vjik\TelegramBot\Api\Method\Sticker\SetStickerMaskPosition;
 use Vjik\TelegramBot\Api\Method\Sticker\SetStickerPositionInSet;
+use Vjik\TelegramBot\Api\Method\Sticker\SetStickerSetThumbnail;
 use Vjik\TelegramBot\Api\Method\Sticker\SetStickerSetTitle;
 use Vjik\TelegramBot\Api\Method\Sticker\UploadStickerFile;
 use Vjik\TelegramBot\Api\Method\UnbanChatMember;
@@ -1647,6 +1648,27 @@ public function setStickerPositionInSet(string $sticker, int $position): FailRes
         return $this->send(new SetStickerPositionInSet($sticker, $position));
     }
 
+    /**
+     * @see https://core.telegram.org/bots/api#setstickersetthumbnail
+     *
+     * @psalm-suppress MixedInferredReturnType,MixedReturnStatement
+     */
+    public function setStickerSetThumbnail(
+        string $name,
+        int $userId,
+        string $format,
+        InputFile|string|null $thumbnail = null,
+    ): FailResult|true {
+        return $this->send(
+            new SetStickerSetThumbnail(
+                $name,
+                $userId,
+                $format,
+                $thumbnail
+            )
+        );
+    }
+
     /**
      * @see https://core.telegram.org/bots/api#setstickersettitle
      *
diff --git a/tests/Method/Sticker/SetStickerSetThumbnailTest.php b/tests/Method/Sticker/SetStickerSetThumbnailTest.php
new file mode 100644
index 0000000..ef7832e
--- /dev/null
+++ b/tests/Method/Sticker/SetStickerSetThumbnailTest.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Vjik\TelegramBot\Api\Tests\Method\Sticker;
+
+use HttpSoft\Message\StreamFactory;
+use PHPUnit\Framework\TestCase;
+use Vjik\TelegramBot\Api\Method\Sticker\SetStickerSetThumbnail;
+use Vjik\TelegramBot\Api\Request\HttpMethod;
+use Vjik\TelegramBot\Api\Type\InputFile;
+
+final class SetStickerSetThumbnailTest extends TestCase
+{
+    public function testBase(): void
+    {
+        $method = new SetStickerSetThumbnail('animals_by_my_bot', 123, 'static');
+
+        $this->assertSame(HttpMethod::POST, $method->getHttpMethod());
+        $this->assertSame('setStickerSetThumbnail', $method->getApiMethod());
+        $this->assertSame(
+            [
+                'name' => 'animals_by_my_bot',
+                'user_id' => 123,
+                'format' => 'static',
+            ],
+            $method->getData(),
+        );
+    }
+
+    public function testFull(): void
+    {
+        $file = new InputFile((new StreamFactory())->createStream());
+        $method = new SetStickerSetThumbnail('animals_by_my_bot', 123, 'static', $file);
+
+        $this->assertSame(HttpMethod::POST, $method->getHttpMethod());
+        $this->assertSame('setStickerSetThumbnail', $method->getApiMethod());
+        $this->assertSame(
+            [
+                'name' => 'animals_by_my_bot',
+                'user_id' => 123,
+                'thumbnail' => $file,
+                'format' => 'static',
+            ],
+            $method->getData(),
+        );
+    }
+
+    public function testPrepareResult(): void
+    {
+        $method = new SetStickerSetThumbnail('animals_by_my_bot', 123, 'static');
+
+        $preparedResult = $method->prepareResult(true);
+
+        $this->assertTrue($preparedResult);
+    }
+}
diff --git a/tests/TelegramBotApiTest.php b/tests/TelegramBotApiTest.php
index 675399f..a5ac43a 100644
--- a/tests/TelegramBotApiTest.php
+++ b/tests/TelegramBotApiTest.php
@@ -1302,6 +1302,18 @@ public function testSetStickerPositionInSet(): void
         $this->assertTrue($result);
     }
 
+    public function testSetStickerSetThumbnail(): void
+    {
+        $api = $this->createApi([
+            'ok' => true,
+            'result' => true,
+        ]);
+
+        $result = $api->setStickerSetThumbnail('animals_by_boy', 123, 'static');
+
+        $this->assertTrue($result);
+    }
+
     public function testSetStickerSetTitle(): void
     {
         $api = $this->createApi([