Showtime’s “Masters of Sex” has added to its cast for the upcoming season, booking actress Erin Cummings for a guest role.

Cummings will appear as Kitty, a high class prostitute with a no nonsense, “get the job done” attitude. She is described as smart and calculating, but also care-taking. Kitty will be pivotal in the research conducted by Masters and Johnson.

The role is open-ended for recurring.

Cummings’ recent credits include guest spots on “Criminal Minds,” “Inside Amy Schumer” and “Unforgettable.” She is also set to appear in ABC’s upcoming drama “Astronaut Wives Club.”

Based on true events, “Masters of Sex” follows Dr. William Masters (Michael Sheen) and his assistant Virginia Johnson (Lizzy Caplan) as they pursue the science of human sexuality through controversial research studies. Production of the drama’s second season is currently underway in Los Angeles.

Cummings is repped by Untitled Management and Paradigm.

Season two of “Masters of Sex” premieres July 13th.