diff --git a/blocks/library/latest-posts/index.php b/blocks/library/latest-posts/index.php
index bb06d4b4fe5a5e..b391ac794496df 100644
--- a/blocks/library/latest-posts/index.php
+++ b/blocks/library/latest-posts/index.php
@@ -56,6 +56,10 @@ function render_block_core_latest_posts( $attributes ) {
 		$class .= ' columns-' . $attributes['columns'];
 	}
 
+	if ( isset( $attributes['className'] ) && ! empty( $attributes['className'] ) ) {
+		$class .= ' ' . $attributes['className'];
+	}
+
 	$block_content = sprintf(
 		'<ul class="%1$s">%2$s</ul>',
 		esc_attr( $class ),
@@ -102,6 +106,9 @@ function register_block_core_latest_posts() {
 				'type'    => 'string',
 				'default' => 'date',
 			),
+			'className'       => array(
+				'type'    => 'string',
+			),
 		),
 		'render_callback' => 'render_block_core_latest_posts',
 	) );