Leung, who played Miles on "Lost," will play Gene, a tenant in Silverman's building who spends most of his time with a blanket in front of his TV. Since the end of "Lost" in 2010, Leung made a guest appearance on "The Good Wife."
Notaro, who appeared on Silverman's Comedy Central series, "The Sarah Silverman Program," will play a mother and fellow tenant in Silverman's character's apartment building. Notaro's character is described as an eccentric woman.
The show follows Silverman's character as she adjusts to life as a newly single woman after ending a committed, decade-long relationship. Silverman co-wrote the project with fellow "Sarah Silverman Program" veterans Dan Sterling and Jon Schroeder.
According to TVLine,