Mary LaRoche (also often credited Mary La Roche; July 20, 1920 – February 9, 1999) was an American actress and singer best known for her roles in the feature films Gidget (1959) and Bye Bye Birdie (1963) and for her performances as a guest star and supporting character on American television series between the early 1950s and mid-1970s, including on such popular series as The Twilight Zone, The Alfred Hitchcock Hour, Perry Mason, and Gunsmoke.

Born in Rochester, New York in 1920, Mary was the youngest of three daughters of Catherine R. (née Carney) and William P. La Roche.

[1][2] Mary received training in piano and voice at the Eastman School of Music in Rochester and by age 10 she was already acting on radio programs.

She later was cast in various feature films during the 1950s and 1960s, including in the role of a singer in Catskills Honeymoon in 1950; Operation Mad Ball in 1957; Clark Gable's love interest in 1958's Run Silent, Run Deep; The Lineup, also released in 1958; Gidget in 1959, in which she portrays the mother of Sandra Dee's title character; The Ladies Man in 1961; Bye Bye Birdie in 1963, playing the part of Ann Margaret's mother; and The Swinger in 1966.

In that episode of the classic Western, in a central role opposite Burt Reynolds, she portrays a beleaguered and mentally exhausted widow trying to survive alone on an isolated farmstead in Kansas during the late 1870s.