Grenier and Gyllenhaal team up in N.Y.C. Plus: Kristen Bell, Anthony Mackie, Claire Danes and more!

GOING FORMAL

Proving rockers clean up well, Steve Van Zandt and Bruce Springsteen trade in their usual T-shirts and bandanas for tuxedos on the N.Y.C. set of Van Zandt's TV series, Lilyhammer, on Thursday.