Keke Palmer ("Animal," "A Trip to Bountiful") has signed on to join the new season of the Showtime drama "Masters of Sex." Palmer will guest star as the Masters' nanny, Coral, whom they hire to care for their new baby.

"Masters of Sex," which premiered last fall, stars Michael Sheen and Lizzy Caplan as famed sex researchers William Masters and Virginia Johnson. Caitlin Fitzgerald plays Masters' wife, Libby. Production on season two of the series will begin mid-March in Los Angeles.

The series is executive produced by Carl Beverly, Sarah Timberman, Judith Verno and Amy Lippman. Michael Dinner, Sheen, Tammy Rosen and Thomas Maier serve as producers.

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