CBS announced Tuesday that the 30-year-old actress will guest star in Two and a Half Men as "a young, beautiful, free-spirited world traveler who shows up on Walden's doorstep."
"Walden feels an instant connection with her, convinced she's 'the one,'" the press release continues. "The problem is, Walden was about to propose to someone else."
Kunis and Kutcher reportedly got engaged last month after one year of dating. The pair met on the set of the 1990s sitcom That 70's Show.