Jennylyn Vergara Mercado (born May 15, 1987) is a Filipino actress, singer and songwriter. She gained fame as the winner of the first season of the Philippine TV series StarStruck, a reality search show on GMA Network. She has released three albums from GMA Records and Viva Records which have several popular singles such as "Sa Aking Panaginip," "Moments Of Love" collaboration with Janno Gibbs, "Maybe This Time" and Kahit Sandali."
Her first films included So Happy Together and the teen-flick Let the Love Begin but her most acclaimed film performance was a Filipino period piece, Rosario. Jennylyn's acting career is handled by Becky Aguila and VIVA Entertainment, Inc. Her singing career is managed by VIVA Records. Her contract with VIVA ended in 2011. Jennylyn signed back with Regal Entertainment.
Mercado recently branched out into television hosting, hosting the Philippine reality series Protégé: The Battle For The Big Break with co-hosts Ogie Alcasid and Dingdong Dantes. She is also in the GMA-7 Sunday talk show, Showbiz Central.