Mila Kunis will guest star on an upcoming episode of her fiancé Ashton Kutcher's sitcom,
Two and a Half Men. She'll play Vivian, a young, free-spirited traveler, who turns up on Walden's (Ashton) doorstep and plays with his heart strings. Walden believes Vivian is "The One," but her appearance causes a stir as he was just about to propose to someone else.
Meanwhile, Mila and Ashton - who starred as an on/off couple on Fox's
That '70s Show from 1998 to 2006 - sparked rumors they were engaged after the
Ted star was spotted wearing a diamond on her ring finger while out shopping in Los Angeles.
Ashton - who divorced Demi Moore last year after being discovered cheating on her - started dating Mila in April 2012.