A Hollywood performer for more than 60 years, he was named New Star of the Year at the 1953 Golden Globes for the film So Big, opposite Jane Wyman.
He soon transitioned to TV roles in Playhouse 90, Lux Video Theater, and Alfred Hitchcock Presents before Western roles in Gunsmoke, Bonanza, and The Virginian.
He also appeared in British crime drama The Baron, the first color series on British TV.
For Aaron Spelling, Forrest starred on the action show S.W.A.T. for two seasons.
Later TV roles included Dallas, Malibu, and Gunsmoke: Return to Dodge.
Source: TV Guide