diff --git a/src/wp-includes/post-thumbnail-template.php b/src/wp-includes/post-thumbnail-template.php
index cee8fa480b..b349cc66e5 100644
--- a/src/wp-includes/post-thumbnail-template.php
+++ b/src/wp-includes/post-thumbnail-template.php
@@ -186,17 +186,20 @@ function get_the_post_thumbnail( $post = null, $size = 'post-thumbnail', $attr =
 			update_post_thumbnail_cache();
 		}
 
-		// Get the 'loading' attribute value to use as default, taking precedence over the default from
-		// `wp_get_attachment_image()`.
-		$loading = wp_get_loading_attr_default( 'the_post_thumbnail' );
+		// Add `loading` attribute.
+		if ( wp_lazy_loading_enabled( 'img', 'the_post_thumbnail' ) ) {
+			// Get the 'loading' attribute value to use as default, taking precedence over the default from
+			// `wp_get_attachment_image()`.
+			$loading = wp_get_loading_attr_default( 'the_post_thumbnail' );
 
-		// Add the default to the given attributes unless they already include a 'loading' directive.
-		if ( empty( $attr ) ) {
-			$attr = array( 'loading' => $loading );
-		} elseif ( is_array( $attr ) && ! array_key_exists( 'loading', $attr ) ) {
-			$attr['loading'] = $loading;
-		} elseif ( is_string( $attr ) && ! preg_match( '/(^|&)loading=/', $attr ) ) {
-			$attr .= '&loading=' . $loading;
+			// Add the default to the given attributes unless they already include a 'loading' directive.
+			if ( empty( $attr ) ) {
+				$attr = array( 'loading' => $loading );
+			} elseif ( is_array( $attr ) && ! array_key_exists( 'loading', $attr ) ) {
+				$attr['loading'] = $loading;
+			} elseif ( is_string( $attr ) && ! preg_match( '/(^|&)loading=/', $attr ) ) {
+				$attr .= '&loading=' . $loading;
+			}
 		}
 
 		$html = wp_get_attachment_image( $post_thumbnail_id, $size, false, $attr );
diff --git a/tests/phpunit/tests/post/thumbnails.php b/tests/phpunit/tests/post/thumbnails.php
index d170e1bfa5..73199e4b4e 100644
--- a/tests/phpunit/tests/post/thumbnails.php
+++ b/tests/phpunit/tests/post/thumbnails.php
@@ -408,6 +408,41 @@ class Tests_Post_Thumbnail_Template extends WP_UnitTestCase {
 		$this->assertSame( $expected, $result );
 	}
 
+	/**
+	 * @ticket 57490
+	 */
+	public function test_get_the_post_thumbnail_includes_loading_lazy() {
+		set_post_thumbnail( self::$post, self::$attachment_id );
+
+		$html = get_the_post_thumbnail( self::$post );
+		$this->assertStringContainsString( ' loading="lazy"', $html );
+	}
+
+	/**
+	 * @ticket 57490
+	 */
+	public function test_get_the_post_thumbnail_respects_passed_loading_attr() {
+		set_post_thumbnail( self::$post, self::$attachment_id );
+
+		$html = get_the_post_thumbnail( self::$post, 'post-thumbnail', array( 'loading' => 'eager' ) );
+		$this->assertStringContainsString( ' loading="eager"', $html, 'loading=eager was not present in img tag because attributes array with loading=eager was overwritten.' );
+
+		$html = get_the_post_thumbnail( self::$post, 'post-thumbnail', 'loading=eager' );
+		$this->assertStringContainsString( ' loading="eager"', $html, 'loading=eager was not present in img tag because attributes string with loading=eager was overwritten.' );
+	}
+
+	/**
+	 * @ticket 57490
+	 */
+	public function test_get_the_post_thumbnail_respects_wp_lazy_loading_enabled_filter() {
+		set_post_thumbnail( self::$post, self::$attachment_id );
+
+		add_filter( 'wp_lazy_loading_enabled', '__return_false' );
+
+		$html = get_the_post_thumbnail( self::$post );
+		$this->assertStringNotContainsString( ' loading="lazy"', $html );
+	}
+
 	public function data_post_thumbnail_size_filter_complex() {
 		return array(
 			array( 0, 'medium' ),