Born Karlo Gucci, he was raised in Angeles City, Pampanga and attended Don Bosco Academy in high school. In 2006, he joined reality-based talent search show,StarStruck, and won the "Ultimate Hunk" title. As of September 1, 2007, Abrenica signed a contract for Regal Films. Abrenica played Cervano/Zaido in Zaido: Pulis Pangkalawakan. He has also appeared in Dyesebel and Boys Nxt Door, Luna Mystica and SOP Rules. He is also named Yes Magazine's Next Big Male Star. Abrenica played Miguelito "Lito" Sanchez in the afternoon drama, Dapat Ka Bang Mahalin?. He also starred in the film Nandito Ako...Nagmamahal Sa'Yo, a film produced by Regal Films. He appeared in All My Life in 2009 and in the television series The Last Prince in January 2010, which was followed by Ilumina in October 2010, Machete & Amaya in 2011. Abrenica joined in a GMA Christmas Reality show, Puso Ng Pasko: Artista Challenge in December 2010 and stars in the GMA horror comedy anthology, Spooky Nights Presents: The Ringtone which premiered April 2011, And Spooky Valentine Presents: Manibela which premiered February 2012. He is the brother of Vin Abrenica, a contestant of TV5's Artista Academy.