Unfortunately, fans of "Two and a Half Men" will have to wait until April to see another an all-new episode since the popular comedy series is going on a short hiatus for the rest of the month. However, when the CBS hit returns, Brooke D'Orsay will reprise her role as Walden's ex-girlfriend's Kate.

During the next episode, entitled "West Side Story," Walden will get an invitation to the grand opening of Kate's boutique. Although their relationship was based on the lie that he told her about being a poor man named Sam, eventually their romance was able to evolve into something more, notes CarterMatt.com. Plus, Kimberly Williams-Paisley will return as Alan's new love interest, Gretchen, on the April 3 episode.

CBS issued a press release and an official synopsis of the episode, which reads, "Walden gets an invitation to his ex-girlfriend's boutique opening. Meanwhile, Gretchen wants to spend more time at Alan's (a.k.a. Jeff Strongman) house."

Earlier this month, CBS announced that Mila Kunis will appear opposite her real-life boyfriend Ashton Kutcher as a guest-star in an upcoming episode of "Two and a Half Men," reports The Hollywood Reporter. This will mark the couple's first appearance together on television since they starred in "That '70s Show." The two met back in 1998 on set at the Fox sitcom and have been dating for the last two years.

Kunis will play Vivian, a young, beautiful and free-spirited world traveler who shows up on Walden's doorstep. In turn, Walden, who was about to propose to someone else, will feel an instant connection with her and become convinced that she's the one.

Kunis, a voice actor on Fox's "Family Guy," has starred in a number of movies including "Black Swan," "Oz the Great and Powerful," "Ted," "Friends With Benefits" and "Forgetting Sarah Marshall." She will next be seen in "Jupiter Ascending" and "Third Person."

"Two and a Half Men" S11E18, "West Side Story," airs on Thursday, April 3 at 9 p.m. EST on CBS.