Garrett appeared in numerous Broadway shows, including Something for the Boys, Call Me Mister, Bells Are Ringing, Meet Me In St. Louis and the Roundabout Theater Company's production of Follies.
She was a founding member of the 49-year-old Theatre West and appeared in many of their productions, including Nunsense, Waiting in the Wings, and a revue, Betty Garrett, Closet Songwriter. She also appeared in many benefits for S.T.A.G.E. Garrett received the Career Achievement Awards from the Los Angeles Drama Critics' Circle and the Ovation Awards, among other honors.
Her many film and television credits include Words and Music, Take Me Out to the Ball Game, Neptune's Daughter, On The Town, My Sister Eileen, All in the Family, Laverne and Shirley, and Becker.
She is survived by her sons, actor Andrew Parks and composer Garrett Parks, and a granddaughter, Madison Claire Parks.