diff --git a/src/TgBotLib/Enums/Methods.php b/src/TgBotLib/Enums/Methods.php
index f3f48be..3620d33 100644
--- a/src/TgBotLib/Enums/Methods.php
+++ b/src/TgBotLib/Enums/Methods.php
@@ -18,6 +18,7 @@
     use TgBotLib\Methods\SendMessage;
     use TgBotLib\Methods\SendPhoto;
     use TgBotLib\Methods\SendVideo;
+    use TgBotLib\Methods\SendVoice;
 
     enum Methods : string
     {
@@ -34,6 +35,7 @@
         case SEND_DOCUMENT = 'sendDocument';
         case SEND_VIDEO = 'sendVideo';
         case SEND_ANIMATION = 'sendAnimation';
+        case SEND_VOICE = 'sendVoice';
 
         /**
          * Executes a command on the provided bot with the given parameters.
@@ -60,6 +62,7 @@
                 self::SEND_DOCUMENT => SendDocument::execute($bot, $parameters),
                 self::SEND_VIDEO => SendVideo::execute($bot, $parameters),
                 self::SEND_ANIMATION => SendAnimation::execute($bot, $parameters),
+                self::SEND_VOICE => SendVoice::execute($bot, $parameters),
             };
         }
     }
diff --git a/src/TgBotLib/Methods/SendVoice.php b/src/TgBotLib/Methods/SendVoice.php
new file mode 100644
index 0000000..57c8e9d
--- /dev/null
+++ b/src/TgBotLib/Methods/SendVoice.php
@@ -0,0 +1,110 @@
+<?php
+
+    namespace TgBotLib\Methods;
+
+    use TgBotLib\Abstracts\Method;
+    use TgBotLib\Bot;
+    use TgBotLib\Enums\Methods;
+    use TgBotLib\Exceptions\TelegramException;
+    use TgBotLib\Interfaces\ObjectTypeInterface;
+    use TgBotLib\Objects\Message;
+    use TgBotLib\Objects\MessageEntity;
+    use TgBotLib\Objects\ReplyParameters;
+
+    class SendVoice extends Method
+    {
+        /**
+         * Use this method to send audio files, if you want Telegram clients to display the file as a playable voice
+         * message. For this to work, your audio must be in an .OGG file encoded with OPUS, or in .MP3 format, or in
+         * .M4A format (other formats may be sent as Audio or Document). On success, the sent Message is returned.
+         * Bots can currently send voice messages of up to 50 MB in size, this limit may be changed in the future.
+         *
+         * @param Bot $bot
+         * @param array $parameters
+         * @return Message
+         * @throws TelegramException
+         */
+        public static function execute(Bot $bot, array $parameters = []): Message
+        {
+            // Handle object conversions
+            if (isset($parameters['caption_entities']) && $parameters['caption_entities'])
+            {
+                $entities = [];
+                foreach ($parameters['caption_entities'] as $entity)
+                {
+                    if ($entity instanceof MessageEntity)
+                    {
+                        $entities[] = $entity->toArray();
+                    }
+                    else
+                    {
+                        $entities[] = $entity;
+                    }
+                }
+                $parameters['caption_entities'] = $entities;
+            }
+
+            if (isset($parameters['reply_parameters']) && $parameters['reply_parameters'] instanceof ReplyParameters)
+            {
+                $parameters['reply_parameters'] = $parameters['reply_parameters']->toArray();
+            }
+
+            if (isset($parameters['reply_markup']))
+            {
+                if ($parameters['reply_markup'] instanceof ObjectTypeInterface)
+                {
+                    $parameters['reply_markup'] = json_encode($parameters['reply_markup']->toArray());
+                }
+                elseif (is_array($parameters['reply_markup']))
+                {
+                    $parameters['reply_markup'] = json_encode($parameters['reply_markup']);
+                }
+            }
+
+            // Handle different voice input types
+            if (isset($parameters['voice']))
+            {
+                $voice = $parameters['voice'];
+
+                // If voice is a file path and exists locally
+                if (is_string($voice) && file_exists($voice) && is_file($voice))
+                {
+                    return Message::fromArray(self::executeCurl(self::buildUpload($bot, Methods::SEND_VOICE->value, 'voice', $voice, array_diff_key($parameters, ['voice' => null]))));
+                }
+            }
+
+            // If voice is a file_id or URL, use regular POST method
+            return Message::fromArray(self::executeCurl(self::buildPost($bot, Methods::SEND_VOICE->value, $parameters)));
+        }
+
+        /**
+         * @inheritDoc
+         */
+        public static function getRequiredParameters(): ?array
+        {
+            return [
+                'chat_id',
+                'voice',
+            ];
+        }
+
+        /**
+         * @inheritDoc
+         */
+        public static function getOptionalParameters(): ?array
+        {
+            return [
+                'business_connection_id',
+                'message_thread_id',
+                'caption',
+                'parse_mode',
+                'caption_entities',
+                'duration',
+                'disable_notification',
+                'protect_content',
+                'message_effect_id',
+                'reply_parameters',
+                'reply_markup'
+            ];
+        }
+    }
diff --git a/tests/TgBotLib/Methods/SendVoiceTest.php b/tests/TgBotLib/Methods/SendVoiceTest.php
new file mode 100644
index 0000000..5fef1b4
--- /dev/null
+++ b/tests/TgBotLib/Methods/SendVoiceTest.php
@@ -0,0 +1,120 @@
+<?php
+
+namespace TgBotLib\Methods;
+
+use PHPUnit\Framework\TestCase;
+use TgBotLib\Bot;
+use TgBotLib\Exceptions\TelegramException;
+use TgBotLib\Objects\InlineKeyboardButton;
+use TgBotLib\Objects\InlineKeyboardMarkup;
+use TgBotLib\Objects\Message;
+use TgBotLib\Objects\MessageEntity;
+
+class SendVoiceTest extends TestCase
+{
+    private static Bot $bot;
+
+    /**
+     * Set up the bot instance before all tests.
+     *
+     * @return void
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$bot = new Bot(BOT_TOKEN);
+    }
+
+    /**
+     * Tests sending a voice file to a specified chat.
+     *
+     * @return void
+     */
+    public function testSendVoice(): void
+    {
+        $result = self::$bot->sendVoice(
+            chat_id: TEST_CHAT_ID,
+            voice: __DIR__ . DIRECTORY_SEPARATOR . 'sample' . DIRECTORY_SEPARATOR . 'ted.ogg',
+            caption: 'Test Unit: testSendVoice',
+            duration: 30,
+            disable_notification: true
+        );
+
+        $this->assertInstanceOf(Message::class, $result);
+        $this->assertEquals(TEST_CHAT_ID, $result->getChat()->getId());
+    }
+
+
+    /**
+     * Tests sending a voice file using a URL.
+     *
+     * @return void
+     */
+    public function testSendVoiceWithUrl(): void
+    {
+        $result = self::$bot->sendVoice(
+            chat_id: TEST_CHAT_ID,
+            voice: 'https://example.com/voice.ogg',
+            caption: 'Here is a voice message from a URL',
+            duration: 25
+        );
+
+        $this->assertInstanceOf(Message::class, $result);
+        $this->assertEquals(TEST_CHAT_ID, $result->getChat()->getId());
+        $this->assertEquals(25, $result->getVoice()->getDuration());
+    }
+
+    /**
+     * Tests sending a voice file with caption entities.
+     *
+     * @return void
+     */
+    public function testSendVoiceWithCaptionEntities(): void
+    {
+        $captionEntities = [
+            new MessageEntity(type: 'bold', offset: 0, length: 4),
+            new MessageEntity(type: 'italic', offset: 5, length: 5)
+        ];
+
+        $result = self::$bot->sendVoice(
+            chat_id: TEST_CHAT_ID,
+            voice: 'https://example.com/voice.ogg',
+            caption: 'This is a test',
+            caption_entities: $captionEntities
+        );
+
+        $this->assertInstanceOf(Message::class, $result);
+        $this->assertEquals(TEST_CHAT_ID, $result->getChat()->getId());
+        $this->assertEquals('This is a test', $result->getCaption());
+    }
+
+    /**
+     * Tests sending a voice file with custom reply markup.
+     *
+     * @return void
+     */
+    public function testSendVoiceWithReplyMarkup(): void
+    {
+        $replyMarkup = new InlineKeyboardMarkup();
+        $replyMarkup->addRow(
+            InlineKeyboardButton::fromArray(['text' => 'Button 1', 'callback_data' => 'button1']),
+            InlineKeyboardButton::fromArray(['text' => 'Button 2', 'callback_data' => 'button2'])
+        );
+
+        try
+        {
+            $result = self::$bot->sendVoice(
+                chat_id: TEST_CHAT_ID,
+                voice: __DIR__ . DIRECTORY_SEPARATOR . 'sample' . DIRECTORY_SEPARATOR . 'ted.ogg',
+                reply_markup: $replyMarkup
+            );
+
+            $this->assertInstanceOf(Message::class, $result);
+            $this->assertEquals(TEST_CHAT_ID, $result->getChat()->getId());
+        }
+        catch (TelegramException $e)
+        {
+            $this->fail('Failed to send voice message: ' . $e->getMessage());
+        }
+    }
+
+}
diff --git a/tests/TgBotLib/Methods/sample/ted.ogg b/tests/TgBotLib/Methods/sample/ted.ogg
new file mode 100644
index 0000000..be6b812
Binary files /dev/null and b/tests/TgBotLib/Methods/sample/ted.ogg differ