Charlie Hunnam [1] was back on the beach in Hawaii to prep for his upcoming action flick, Triple Frontier. On Sunday, the hunky English actor went shirtless [2] for a day on the sand, where he was joined by costars Garrett Hedlund, Oscar Isaac, and Pedro Pascal; the Narcos star is a new addition to the cast, who we unfortunately didn't get to see during Charlie's recent Honolulu beach day [3]. Charlie was spotted slathering his muscles in sunscreen — safety first! — before the group worked with trainers in the ocean.

Earlier this month, Charlie, Garrett, Oscar, and a tattooed Ben Affleck [4] were photographed getting ready for their film, in which they play five friends who reunite to take down a South American drug lord. Charlie and Garrett even indulged in a bit of play-fighting [5], which made our eyes very, very happy. Keep reading to see Charlie protecting himself from the hot sun while manageing to be even hotter.