Cay Forrester (born Mila Patricia Crosby; December 26, 1921 – June 18, 2005) was an American film and television actress.

She appeared predominantly in minor films with some exceptions, such as Advise and Consent and the Susan Hayward hit Smash-Up, the Story of a Woman.

Her biggest role was in the 1950 cult classic DOA, where Forrester played a married woman who tempts Edmond O'Brien.

Shortly after this film, she married producer Ludlow Flower Jr and retired from the big screen.

Forrester went on to write and co-star in the 1961 thriller Five Minutes to Live produced by her husband that was notable for the rare big-screen appearance of Johnny Cash.