The Hollywood Reporter has learned that Christian Borle is going to join the cast of Masters of Sex.Borle will recur as Frank Masters, William Masters’ (Michael Sheen) Brother. He is the latest in a slew of recurring guest stars on this season of Masters of Sex, which includes Sarah Silverman, Betsy Brandt, and Keke Palmer.

In addition to his work on Smash, Borle is known for his work on Broadway in productions such as Spamalot, Legally Blonde, and Peter.

Season 2 of Masters of Sex premieres Sunday July 13th on Showtime.