We’re hoping Ashton Kutcher really is over his Punk’d days, because his latest antic isn’t one to joke about. E! Onlinereported on Thursday night that Kutcher and his girlfriend of nearly two years, Mila Kunis, are engaged! What gave it away, you might ask? You know, just that casual little rock (read: big sparkly diamond) resting on her left ring finger. She was spotted wearing the new piece of jewelry while out shopping with her mom, and a source close to Kutcher confirmed the news to People. Despite their attempts to keep their relationship under wraps early on, the match is truly one made in 70’s heaven.