Chris Carmack is Shirtless

Chris Carmack shoots some shirtless scenes on the set of his new movie, The Reef, in Hawaii on Tuesday.

The Reef is a direct-to-DVD film from MGM and Brookwell McNamara Entertainment about a couple with a local dive shop and David Anders as the bad guy who hires them for an underwater job. (Anders played Adam Monroe on Heroes and Julian Sark on Alias.)

Carmack, 27, is best known for playing Luke Ward on The O.C. He played the cheating boyfriend of Marissa Cooper (Mischa Barton), who uttered the now-famous line, “Welcome to the O.C., b—-!”