Marion Ross is an American actress. Her best-known role is that of Marion Cunningham on the ABC television sitcom Happy Days, on which she starred from 1974 to 1984 and for which she received two Primetime Emmy Award nominations. Before her success on Happy Days, Ross appeared in a variety of film roles, appearing in The Glenn Miller Story (1954), Sabrina (1954), Lust for Life (1956), Teacher's Pet (1958), Some Came Running (1958), Operation Petticoat (1959), and Honky (1971), as well as several minor television roles, one of which was on television's The Lone Ranger (1954). She was also twice nominated successively in 1992 and 1993 for the Primetime Emmy Award for her performance on the CBS television comedy-drama Brooklyn Bridge and later netted another Emmy nomination in 1999 for a two-episode appearance on the popular CBS drama Touched by an Angel. Ross also starred in the high-profile, long-anticipated sequel to Terms of Endearment (1983), The Evening Star (1996), in a turn for which she was nominated for the Golden Globe Award for Best Supporting Actress, as well as both a nomination and win for a Lone Star Film and Television Award for Best Supporting Actress.

Happy Days is an American television sitcom that aired first-run on the ABC network from January 15, 1974, to July 19, 1984, with a total of 255 half-hour episodes spanning 11 seasons. Created by Garry Marshall, it was one of the most successful series of the 1970s. The series presented an idealized vision of life in the 1950s and early 1960s Midwestern United States, and it starred Ron Howard as Richie Cunningham, Henry Winkler as his friend Fonzie, and Tom Bosley and Marion Ross as Richie's parents, Howard and Marion Cunningham. Although it opened to mixed reviews from critics, Happy Days became successful and popular over time.