diff --git a/modules/images/webp-uploads/load.php b/modules/images/webp-uploads/load.php
index 939501d3fc..6442a3db20 100644
--- a/modules/images/webp-uploads/load.php
+++ b/modules/images/webp-uploads/load.php
@@ -597,3 +597,41 @@ function webp_uploads_img_tag_update_mime_type( $image, $context, $attachment_id
 }
 
 add_filter( 'the_content', 'webp_uploads_update_image_references', 10 );
+
+/**
+ * Updates the response for an attachment to include sources for additional mime types available the image.
+ *
+ * @since n.e.x.t
+ *
+ * @param WP_REST_Response $response The original response object.
+ * @param WP_Post          $post     The post object.
+ * @param WP_REST_Request  $request  The request object.
+ * @return WP_REST_Response A new response object for the attachment with additional sources.
+ */
+function webp_uploads_update_rest_attachment( WP_REST_Response $response, WP_Post $post, WP_REST_Request $request ) {
+	$data = $response->get_data();
+	if ( ! isset( $data['media_details']['sizes'] ) || ! is_array( $data['media_details']['sizes'] ) ) {
+		return $response;
+	}
+
+	$metadata = wp_get_attachment_metadata( $post->ID );
+	foreach ( $data['media_details']['sizes'] as $size => $details ) {
+		if ( empty( $metadata['sizes'][ $size ]['sources'] ) || ! is_array( $metadata['sizes'][ $size ]['sources'] ) ) {
+			continue;
+		}
+
+		$sources   = array();
+		$directory = dirname( $data['media_details']['sizes'][ $size ]['source_url'] );
+		foreach ( $metadata['sizes'][ $size ]['sources'] as $mime => $mime_details ) {
+			$source_url                 = "{$directory}/{$mime_details['file']}";
+			$mime_details['source_url'] = $source_url;
+			$sources[ $mime ]           = $mime_details;
+		}
+
+		$data['media_details']['sizes'][ $size ]['sources'] = $sources;
+	}
+
+	return rest_ensure_response( $data );
+}
+
+add_filter( 'rest_prepare_attachment', 'webp_uploads_update_rest_attachment', 10, 3 );
diff --git a/tests/modules/images/webp-uploads/webp-uploads-test.php b/tests/modules/images/webp-uploads/webp-uploads-test.php
index 4aa3ea0f7e..4d7a5e2c9c 100644
--- a/tests/modules/images/webp-uploads/webp-uploads-test.php
+++ b/tests/modules/images/webp-uploads/webp-uploads-test.php
@@ -619,6 +619,50 @@ public function data_provider_not_supported_webp_images() {
 		yield 'GIFT image' => array( TESTS_PLUGIN_DIR . '/tests/testdata/modules/images/earth.gif' );
 	}
 
+	/**
+	 * Checks whether the sources information is added to image sizes details of the REST response object.
+	 *
+	 * @test
+	 */
+	public function it_should_add_sources_to_rest_response() {
+		$file_location = TESTS_PLUGIN_DIR . '/tests/testdata/modules/images/leafs.jpg';
+		$attachment_id = $this->factory->attachment->create_upload_object( $file_location );
+		$metadata      = wp_get_attachment_metadata( $attachment_id );
+
+		$request       = new WP_REST_Request();
+		$request['id'] = $attachment_id;
+
+		$controller = new WP_REST_Attachments_Controller( 'attachment' );
+		$response   = $controller->get_item( $request );
+
+		$this->assertInstanceOf( 'WP_REST_Response', $response );
+
+		$data       = $response->get_data();
+		$mime_types = array(
+			'image/jpeg',
+			'image/webp',
+		);
+
+		foreach ( $data['media_details']['sizes'] as $size_name => $properties ) {
+			if ( ! isset( $metadata['sizes'][ $size_name ]['sources'] ) ) {
+				continue;
+			}
+
+			$this->assertArrayHasKey( 'sources', $properties );
+			$this->assertIsArray( $properties['sources'] );
+
+			foreach ( $mime_types as $mime_type ) {
+				$this->assertArrayHasKey( $mime_type, $properties['sources'] );
+
+				$this->assertArrayHasKey( 'filesize', $properties['sources'][ $mime_type ] );
+				$this->assertArrayHasKey( 'file', $properties['sources'][ $mime_type ] );
+				$this->assertArrayHasKey( 'source_url', $properties['sources'][ $mime_type ] );
+
+				$this->assertNotFalse( filter_var( $properties['sources'][ $mime_type ]['source_url'], FILTER_VALIDATE_URL ) );
+			}
+		}
+	}
+
 	/**
 	 * Return an error when creating an additional image source with invalid parameters
 	 *