diff --git a/wp-includes/block-patterns.php b/wp-includes/block-patterns.php
index e5c770e1d4..cb58d9842c 100644
--- a/wp-includes/block-patterns.php
+++ b/wp-includes/block-patterns.php
@@ -391,13 +391,7 @@ function _register_theme_block_patterns() {
 				continue;
 			}
 
-			// The actual pattern content is the output of the file.
-			ob_start();
-			include $file_path;
-			$pattern_data['content'] = ob_get_clean();
-			if ( ! $pattern_data['content'] ) {
-				continue;
-			}
+			$pattern_data['file_path'] = $file_path;
 
 			// Translate the pattern metadata.
 			// phpcs:ignore WordPress.WP.I18n.NonSingularStringLiteralText,WordPress.WP.I18n.NonSingularStringLiteralDomain,WordPress.WP.I18n.LowLevelTranslationFunction
diff --git a/wp-includes/class-wp-block-patterns-registry.php b/wp-includes/class-wp-block-patterns-registry.php
index a11bac06be..1402819c84 100644
--- a/wp-includes/class-wp-block-patterns-registry.php
+++ b/wp-includes/class-wp-block-patterns-registry.php
@@ -101,13 +101,15 @@ final class WP_Block_Patterns_Registry {
 			return false;
 		}
 
-		if ( ! isset( $pattern_properties['content'] ) || ! is_string( $pattern_properties['content'] ) ) {
-			_doing_it_wrong(
-				__METHOD__,
-				__( 'Pattern content must be a string.' ),
-				'5.5.0'
-			);
-			return false;
+		if ( ! isset( $pattern_properties['file_path'] ) ) {
+			if ( ! isset( $pattern_properties['content'] ) || ! is_string( $pattern_properties['content'] ) ) {
+				_doing_it_wrong(
+					__METHOD__,
+					__( 'Pattern content must be a string.' ),
+					'5.5.0'
+				);
+				return false;
+			}
 		}
 
 		$pattern = array_merge(
@@ -177,6 +179,30 @@ final class WP_Block_Patterns_Registry {
 		return $content;
 	}
 
+	/**
+	 * Retrieves the content of a registered block pattern.
+	 *
+	 * @since 6.5.0
+	 *
+	 * @param string $pattern_name      Block pattern name including namespace.
+	 * @param bool   $outside_init_only Optional. Return only patterns registered outside the `init` action. Default false.
+	 * @return string The content of the block pattern.
+	 */
+	private function get_content( $pattern_name, $outside_init_only = false ) {
+		if ( $outside_init_only ) {
+			$patterns = &$this->registered_patterns_outside_init;
+		} else {
+			$patterns = &$this->registered_patterns;
+		}
+		if ( ! isset( $patterns[ $pattern_name ]['content'] ) && isset( $patterns[ $pattern_name ]['file_path'] ) ) {
+			ob_start();
+			include $patterns[ $pattern_name ]['file_path'];
+			$patterns[ $pattern_name ]['content'] = ob_get_clean();
+			unset( $patterns[ $pattern_name ]['file_path'] );
+		}
+		return $patterns[ $pattern_name ]['content'];
+	}
+
 	/**
 	 * Retrieves an array containing the properties of a registered block pattern.
 	 *
@@ -191,6 +217,7 @@ final class WP_Block_Patterns_Registry {
 		}
 
 		$pattern            = $this->registered_patterns[ $pattern_name ];
+		$pattern['content'] = $this->get_content( $pattern_name );
 		$pattern['content'] = $this->prepare_content( $pattern, get_hooked_blocks() );
 
 		return $pattern;
@@ -206,16 +233,17 @@ final class WP_Block_Patterns_Registry {
 	 *                 and per style.
 	 */
 	public function get_all_registered( $outside_init_only = false ) {
-		$patterns      = array_values(
-			$outside_init_only
+		$patterns      = $outside_init_only
 				? $this->registered_patterns_outside_init
-				: $this->registered_patterns
-		);
+				: $this->registered_patterns;
 		$hooked_blocks = get_hooked_blocks();
+
 		foreach ( $patterns as $index => $pattern ) {
+			$pattern['content']            = $this->get_content( $pattern['name'], $outside_init_only );
 			$patterns[ $index ]['content'] = $this->prepare_content( $pattern, $hooked_blocks );
 		}
-		return $patterns;
+
+		return array_values( $patterns );
 	}
 
 	/**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index d5cee36232..d2e65f3c01 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.5-beta2-57682';
+$wp_version = '6.5-beta2-57683';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.