The newly engaged couple filmed the scenes before the news broke that Kunis, 30, was pregnant with the pair's first child. She will play Vivian, "a young, beautiful, free-spirited world traveler who shows up on Walden's doorstep," a press release stated. (Walden is Kutcher's character on the hit CBS comedy.) "Walden feels an instant connection with her, convinced she's 'the one.' The problem is, Walden was about to propose to someone else."
In one clip, the duo has a quippy exchange with nods to their own relationship.
"I bet you only date hot actresses," Kunis as Vivian says to Kutcher, 36.
"God no, I'd never date an actress. They're all crazy," he jokes.
"I don't get this whole fascination with celebrities anyway. Who cares who's dating whom or who's engaged to who or who has a sex tape that no one will ever, ever see?" Kunis continued.
The Jupiter Ascending star's episode of Two and a Half Men airs on Thursday, April 10 at 9:30 p.m. on CBS.