Williams began making frequent appearances on the small screen in the anthology series of the late 40s and 50s (i.e., "Philco Television Playhouse", "Alfred Hitchcock Presents"). She co-starred as Harry Morgan's scatterbrained wife on "Pete and Gladys" (CBS, 1960-62) and headlined her own sitcom "The Cara Williams Show" (CBS, 1964-65). In the latter, she was the wife of a co-worker forced by company policy to pretend they were not married. Williams last series stint to date was in support of Valerie Harper's "Rhoda" (CBS, 1974-75) for that show's first season.
From 1952 until 1959, Williams was married to actor John Barrymore Jr.