Diane Adair is an American actress, best known for the films Instant Trauma, Blue Desert, Dead Silence, and UFOria.

Television credits include the web series My So-Called Co Star Life, TNT’s Babylon 5, BBC’s Harry and the Hendersons, NBC’s Night Court, ABC’s MacGyver, ABC’s Happy Days, and CBS’ One Day at a Time.

Theatre credits include Off-Broadway, as Meg Greenfield/Foley Artist in Top Secret: The Battle for the Pentagon Papers (N.Y. Theatre Workshop); and regionally, as The Narrator in The Great Tennessee Monkey Trial, Mrs. Braddock in The Graduate, Kitty Bennet in Pride & Prejudice, and Linda Lou Edwards in Lone Wolf Rhapsody (L.A. Theatre Works).