Dylan O'Brien in American Assassin (2017)

Dylan O'Brien starred in the action thriller American Assassin as Mitch Rapp, a revenge-fueled man who gets into counterterrorism out of vengeance for the death of his girlfriend. In addition to the action, Dylan also got several scenes to show off his chest. He was shirtless in his very first scene which featured Mitch and his love on the beach before she is killed. He's also shirtless in the scene that follows, showing a time jump. He's shirtless again later as part of a training montage, as he boxes a punching bag. He's shirtless for an action sequence, which begins with him being treated for a wound and ends with a fight scene. Dylan is then shirtless at the end of the film, which finds Mitch back on the beach where he emerges from the water, looking great.