She died at Barlow Respiratory Hospital on Saturday (28Apr12), according to the Associated Press.
The British-born beauty began her acting career in England in the late 1930s and moved to Hollywood after marrying The Adventures of Robin Hood TV star Richard Greene.
Medina became a big star following leading roles opposite Fernando Lamas in Sangaree, Glenn Ford in Plunder of the Sun and Alan Ladd in Botany Bay.
Her additional film credits include Mr. Arkadin, Abbott and Costello in the Foreign Legion, Phantom of the Rue Morgue, Fortunes of Captain Blood, Lady in the Iron Mask, and The Lady and the Bandit.
In 1960, the actress married Citizen Kane star Joseph Cotten and two years later she made her Broadway debut opposite her new husband in Calculated Risk.