Elizabeth Allen (born Elizabeth Ellen Gillease, January 25, 1929 — September 19, 2006) was an American theatre, television, and film actress and singer whose 40-year career lasted from the mid-1950s through the mid-1990s, and included scores of TV episodes and six theatrical features, two of which (1963's Donovan's Reef, for which she received a second-place Golden Laurel Award as Top New Female Personality, and 1964's Cheyenne Autumn) were directed by John Ford.

Sharkey (1976–1977), and the daytime drama Texas (1980–1981), while also maintaining a thriving theatrical career as a musical comedy star and receiving two Tony nominations, in 1962 for The Gay Life and in 1965 for Do I Hear a Waltz?.

Allen is perhaps best known on TV for her role as the creepy saleslady in the first-season episode of Rod Serling's original version of The Twilight Zone, entitled "The After Hours", where actress Anne Francis (playing Miss Marsha White) finally realizes that she is a mannequin and that her month of freedom and living among the humans is over.

Allen's saleslady character (seen by no one but Marsha) is the mannequin whose turn in the outside world is up next and has already been delayed by one full day, thus explaining her slightly peeved attitude.

Allen honed her stage skills by joining and performing with the Helen Hayes Repertory Group before expanding into the big and small screens.

Her other notable stage productions on the Great White Way and beyond included Romanoff and Juliet, Lend an Ear, Sherry!, California Suite, The Pajama Game, The Tender Trap, Show Boat, and South Pacific, and culminating in the 1980s Broadway musical 42nd Street, as fading star Dorothy Brock.

In the late 1970s, Allen ventured into retail business, as she operated a dress store in a San Fernando Valley shopping mall.