Written and directed by Justin Tanner, the play will also star Mary Scheer ("Mad TV"), Maile Flanagan, Jon Palmer, Guilford Adams, Ed Martin and Tom Fitzpatrick. Set and lighting design is by Gary Guidinger. Opening is March 9.

According to press notes, "Set in the near future, Space Therapy is about couples counseling onboard a space ship circling the Earth."

Stewart is best known for playing Harry Solomon on the television series "3rd Rock from the Sun." He has also appeared in the film "Inspector Gadget 2."

Brown — not to be confused with former MTV personality "Downtown" Julie Brown — co-wrote and starred in "Earth Girls Are Easy." She also appeared in "Clueless" and the film's short-lived television spin-off. She co-directed, co-wrote and starred in the television movie "Attack of the 5 Ft. 2 Women" and guest-starred on "Six Feet Under," among other shows.

The Zephyr Theatre is located at 7456 Melrose Avenue in West Hollywood, CA. Tickets are available by calling (323) 852-9111.