Thomas Lockyear "Tom" Graeff (September 12, 1929 – December 19, 1970) was an American screenwriter, director and actor. He is known for the 1959 B-movie Teenagers from Outer Space.
Graeff was born in Ray, Arizona to an engineer father and homemaker mother. When he was a toddler, the family relocated to Los Angeles, where a second son was born. As a teen, Graeff enrolled in the UCLA Theater Arts Program, where he studied film making and theater.