Entertainment Movies Historical Movies Watch 'Batman v Superman' 's Ben Affleck Play a Silly Prank Henry Cavill The two stars have been having some fun on the set of the superhero epic By People Staff Published on March 17, 2016 11:45PM EDT Photo: Source: Ben Affleck/Facebook Ben Affleck vs. Henry Cavill! It seems the two stars of Batman v Superman: Dawn of Justice aren’t just battling it out on screen, but also behind the scenes in the form of silly pranks. Affleck shared a funny video to his Facebook and Instagram account on Thursday revealing some of the hi-jinx the cast of the Zack Snyder movie got up to. In it, Affleck, 43, appears to have decorated Cavill’s trailer full of the film’s posters, joking in his post: “Henry, I’m flattered. I didn’t know you were such a fan! We know #WhoWillWin.” Over to you, Cavill. Batman v Superman: Dawn of Justice hits theaters March 25.