Mila Kunis will reunite with her beau Ashton Kutcher onscreen during season 11 of Two and a Half Men.

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CBS announced on Tuesday that Kunis will star as Vivian, "a young, beautiful, free-spirited world traveler who shows up on Walden's doorstep."

Walden, played by Kutcher, is instantly intrigued by Vivian and even believe she's "the one." However, there's just one problem - he was about to propose to another woman.

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Kunis, 30, and Kutcher, 36, starred as Jackie Burkhart and Michael Kelso on Fox's That 70s Show for eight seasons from 1998 to 2006. On the show, Kunis played Kutcher's hilarious, controlling and self-centered girlfriend.

The two actors, who began dating in 2012, are now rumored to be engaged after Kunis was spotted with a diamond on her ring finger in February.

"Ashton loves to travel and so does Mila, so they have seen a lot of new places and both are charged at the idea of doing it more, even living part-time abroad," a source told People. "They seem to have a lot in common, and that helps keep a relationship strong."

Kutcher was previously married to Demi Moore, 51, for six years. They finalized their divorce last November. Kunis was also in long-term relationship with actor Macauley Culkin, 33, for eight years before they broke up in 2011.

-- Two and a Half Men airs Thursdays at 9 p.m. EST on CBS.