Who does Marc Jacobs think he is? Tom Ford? I can’t imagine why else the designer would tell Style.com that he is getting his well-shoed feet wet in Hollywood. “I got cast in a role in a movie,” he said at last week’s WSJ Magazine Innovator of the Year awards. “They’re filming next week and I’m excited. I get to play a character that’s not myself at all.” So that means, potentially, that Marc Jacobs is at this very minute wandering a movie set dressed as a Nordic Viking.