diff --git a/plugins/wporg-5ftf/includes/contributor.php b/plugins/wporg-5ftf/includes/contributor.php
index e4ba7c6..875dc5f 100644
--- a/plugins/wporg-5ftf/includes/contributor.php
+++ b/plugins/wporg-5ftf/includes/contributor.php
@@ -123,22 +123,40 @@ function populate_list_table_columns( $column, $post_id ) {
 }
 
 /**
- * Create a contributor post as a child of a pledge post.
+ * Add one or more contributors to a pledge.
  *
- * @param string $wporg_username
- * @param int    $pledge_id
+ * Note that this does not validate whether a contributor's wporg username exists in the system.
  *
- * @return int|WP_Error Post ID on success. Otherwise WP_Error.
+ * @param int   $pledge_id    The post ID of the pledge.
+ * @param array $contributors Array of contributor wporg usernames.
+ *
+ * @return void
  */
-function create_new_contributor( $wporg_username, $pledge_id ) {
-	$args = array(
-		'post_type'   => CPT_ID,
-		'post_title'  => sanitize_user( $wporg_username ),
-		'post_parent' => $pledge_id,
-		'post_status' => 'pending',
-	);
+function add_pledge_contributors( $pledge_id, $contributors ) {
+	$results = array();
 
-	return wp_insert_post( $args, true );
+	foreach ( $contributors as $wporg_username ) {
+		$args = array(
+			'post_type'   => CPT_ID,
+			'post_title'  => sanitize_user( $wporg_username ),
+			'post_parent' => $pledge_id,
+			'post_status' => 'pending',
+		);
+
+		$result = wp_insert_post( $args, true );
+
+		$results[ $wporg_username ] = ( is_wp_error( $result ) ) ? $result->get_error_code() : $result;
+	}
+
+	/**
+	 * Action: Fires when one or more contributors are added to a pledge.
+	 *
+	 * @param int   $pledge_id    The post ID of the pledge.
+	 * @param array $contributors Array of contributor wporg usernames.
+	 * @param array $results      Associative array, key is wporg username, value is post ID on success,
+	 *                            or an error code on failure.
+	 */
+	do_action( FiveForTheFuture\PREFIX . '_add_pledge_contributors', $pledge_id, $contributors, $results );
 }
 
 /**
diff --git a/plugins/wporg-5ftf/includes/pledge-form.php b/plugins/wporg-5ftf/includes/pledge-form.php
index 3173efe..bd47193 100755
--- a/plugins/wporg-5ftf/includes/pledge-form.php
+++ b/plugins/wporg-5ftf/includes/pledge-form.php
@@ -90,9 +90,7 @@ function process_form_new() {
 		return $new_pledge_id;
 	}
 
-	foreach ( $contributors as $wporg_username ) {
-		Contributor\create_new_contributor( $wporg_username, $new_pledge_id );
-	}
+	Contributor\add_pledge_contributors( $new_pledge_id, $contributors );
 
 	// Attach logo to the pledge.
 	wp_update_post( array(
diff --git a/plugins/wporg-5ftf/includes/pledge-log.php b/plugins/wporg-5ftf/includes/pledge-log.php
index 6a88a76..3b569e6 100644
--- a/plugins/wporg-5ftf/includes/pledge-log.php
+++ b/plugins/wporg-5ftf/includes/pledge-log.php
@@ -17,6 +17,7 @@ add_action( 'save_post_' . Pledge\CPT_ID, __NAMESPACE__ . '\capture_save_post',
 add_action( 'updated_postmeta', __NAMESPACE__ . '\capture_updated_postmeta', 99, 4 );
 add_action( 'added_post_meta', __NAMESPACE__ . '\capture_added_post_meta', 99, 4 );
 add_action( 'transition_post_status', __NAMESPACE__ . '\capture_transition_post_status', 99, 3 );
+add_action( FiveForTheFuture\PREFIX . '_add_pledge_contributors', __NAMESPACE__ . '\capture_add_pledge_contributors', 99, 3 );
 
 /**
  * Adds a meta box for the log on the custom post type.
@@ -234,3 +235,26 @@ function capture_transition_post_status( $new_status, $old_status, WP_Post $post
 		get_current_user_id()
 	);
 }
+
+/**
+ * Record a log for the event of contributors being added to a pledge.
+ *
+ * @param int   $pledge_id    The post ID of the pledge.
+ * @param array $contributors Array of contributor wporg usernames.
+ * @param array $results      Associative array, key is wporg username, value is post ID on success,
+ *                            or an error code on failure.
+ *
+ * @return void
+ */
+function capture_add_pledge_contributors( $pledge_id, $contributors, $results ) {
+	add_log_entry(
+		$pledge_id,
+		'contributors_added',
+		sprintf(
+			'Contributors added: <code>%s</code>',
+			implode( '</code>, <code>', $contributors )
+		),
+		$results,
+		get_current_user_id()
+	);
+}