Elizabeth Key "Bess" Armstrong is an American actress. She is known for her roles in the films The Four Seasons (1981), High Road to China (1983), Jaws 3-D (1983), and Nothing in Common (1986). Armstrong also starred in the ABC drama series My So-Called Life and had lead roles in a number of made-for-television films.

The Four Seasons is a 1981 American romantic comedy film written and directed by and starring Alan Alda, which co-stars Carol Burnett, Len Cariou, Sandy Dennis, Rita Moreno, Jack Weston, and Bess Armstrong. It draws its title from the four concerti composed by Antonio Vivaldi. Those compositions, along with others by Vivaldi, comprise the musical score.