Sarah Silverman has been cast in Masters of Sex.
The Emmy-winning comedian and actress will play recurring character Helen in the second season of the Showtime drama.
According to The Hollywood Reporter, Helen is Betty's (Annaleigh Ashford) former lesbian lover.
Masters of Sex is based on the true story of real-life pioneers of human sexuality William Masters (Michael Sheen) and Virginia Johnson (Lizzy Caplan), who are doing research in a Missouri hospital.
Silverman is lead actor Michael Sheen's real-life girlfriend.
Breaking Bad star Betsy Brandt and Danny Huston have also been added to the cast of the upcoming season.
Production on the second season of Masters of Sex is currently underway in Los Angeles.
Silverman won an Emmy award for best actress in a comedy series in 2009 for her show The Sarah Silverman Program.
The first season of Masters of Sex was shown on RTÉ Two.