Diana Barrymore (March 3, 1921 – January 25, 1960) was an American stage and movie actress. She was the stepdaughter of Dolores Costello. She was the aunt of the actress Drew Barrymore. She played Leslie Stafford in the movie Nightmare (1942). She played Anne Partridge in Eagle Squadron.
The actress was born in New York City. She died there from an overdose of sleeping pills and alcohol.