With Daniel Radcliffe set to prove just how grown-up he is - by appearing nude in a London revival of Peter Shaffer's Equus - ushers at the Gielgud Theatre stand poised to prevent audience members from snapping cell-phone pics of the young actor's, er, wand. "Pictures aren't allowed in any London theaters," a play rep tells the New York Daily News. "But for Equus, the staff will be extra-vigilant." C'mon, folks, he's 17!