DOUBLE TROUBLE
No, Will hasn't shed all royal decorum. It's Marc Rattigan, a 19-year-old doppelgänger from London who works for Susan Scott Lookalikes, whooping it up with fellow models (including, below left, a stand-in for Prince Harry) at an ersatz birthday bash. Rattigan, who has appeared on British TV and in ads, says he once met William, although they didn't discuss their physical similarities. And he can't fool hard-core royal watchers: He signs autographs with his right hand. The prince is a lefty.