Mila Kunis will guest star with her beau Ashton Kutcher in his American comedy drama Two and a Half Men.

Reports emerged last week that the 30-year-old Friends with Benefits star and Kutcher are engaged. The couple, who have been dating since April 2012, have yet to confirm the news officially.

This isn't the first time the pair will share the small screen – they starred together in That '70's Show in the late 1990s.

Kutcher plays lovable lothario Walden In Two and a Half Men and Kunis will play Vivian, a world traveller who turns up on his doorstep.

When they meet Walden instantly falls in love and believes her to be 'the one'...the only problem is, he was just about to propose to someone else. Awkward.