“If you want to know more about actors, here’s the place,” the late Eve Arnold said of Simon Annand. For 30 years Annand has been photographing actors and actresses in their dressing rooms before performances, capturing those final tense moments before the star hits the stage. It’s a moment filled with fear and anticipation, confidence and self-doubt, when the actor is not wholly himself but has not yet stepped out onto the stage to become his character. Below, a selection of the photographer’s work from his latest exhibition at the Idea Generation Gallery, which runs through April 8, and samples from his book The Half: Photographs of Actors Preparing for the Stage.