Mila Kunis is to guest star on 'Two and a Half Men'. The 30-year-old actress will appear opposite her fiance
Ashton Kutcher, 36, in an upcoming episode of the US sitcom, CBS announced on Tuesday (04.02.14).
The brunette beauty will play Vivian, a young, free-spirited traveller, 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.
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Meanwhile, Mila and Ashton - who starred as an on/off couple on Fox's 'That '70s Show' from 1998 to 2006 - sparked rumours they had got engaged last week after the 'Ted' star was spotted wearing a diamond sparkler on her ring finger while out shopping in Los Angeles, California.
The funnyman - who was married to Demi Moore before divorcing her last year - started dating Mila in April 2012 and they have been inseparable ever since.
READ: Mila Kunis sports natural look for ad campaign However, Mila has previously claimed she isn't interested in tying the knot, but hasn't ruled it out in the future.
She said: ''I would love to find 'The One'. But I'm not sure about marriage. I see no need. I'll be with somebody because I want to, not because a piece of paper tells me I have to. That said, if the love of my life thinks it's important, then fine, I'll get married.''