Image Credit: John M. Heller/Getty ImagesDirector Marc Webb (500 Days of Summer) continues casting Sony’s Spider-Man revamp, slated for 2012. has confirmed that the helmer has tapped Martin Sheen (The West Wing, Apocalypse Now) to play the role of Uncle Ben, who famously (and tragically) taught the wall-crawler the maxim that would guide his heroic career: “With great power comes great responsibility.” Webb has already placed Andrew Garfield (The Social Network) in the role of Spidey and Emma Stone (Easy A) in the part of Peter’s love interest, Gwen Stacy.