Rebecca Romijn plays Captain Pike's first officer, Number One, on Star Trek: Discovery. A model-turned-actress who hails from Berkeley, California, Romijn is best known for playing Mystique in the first three X-Men movies. Her many other film and television credits include Friends, Austin Powers: The Spy Who Shagged Me, Just Shoot Me, Rollerball, Pepper Dennis, Ugly Betty and The Librarians. Romijn also hosted the reality competition Skin Wars.