Alexandra Elizabeth Sheedy is an American actress. She made her feature film debut in Bad Boys (1983) and came to prominence as a member of the Brat Pack with roles in Oxford Blues (1984), The Breakfast Club (1985), St. Elmo's Fire (1985), and Blue City (1986). She received three Saturn Award nominations for Best Actress for her performances in WarGames (1983), Fear (1990), and Man's Best Friend (1993). For playing a drug-addicted lesbian photographer in High Art (1998), Sheedy won the Independent Spirit Award for Best Female Lead. She also starred in the films Twice in a Lifetime (1985), Short Circuit (1986), Betsy's Wedding (1990), Only the Lonely (1991), and Life During Wartime (2009), as well as the series Single Drunk Female (2022–2023).

WarGames is a 1983 American techno-thriller film directed by John Badham, written by Lawrence Lasker and Walter F. Parkes, and starring Matthew Broderick, Dabney Coleman, John Wood and Ally Sheedy. Broderick plays David Lightman, a young computer hacker who unwittingly accesses a United States military supercomputer programmed to simulate, predict and execute nuclear war against the Soviet Union, triggering a false alarm that threatens to start World War III.