Blue Sky is a 1994 American drama film directed by Tony Richardson and written by Rama Stagner, Arlene Sarner and Jerry Leichtling. The film stars Jessica Lange and Tommy Lee Jones, alongside Powers Boothe, Carrie Snodgress, Amy Locane, Chris O'Donnell and Mitchell Ryan in supporting roles. It tells the story of a military officer (Jones) who uncovers a nuclear cover-up while grappling with his wife's (Lange) erratic behavior, leading to a tense clash between duty and family. The film's score was composed by Jack Nitzsche, and it marks the final film of Richardson as director, who died on November 14, 1991.

Blue Sky is based on the relationship between Rama Stagner-Blum's parents, Clyde and Gloria Lee Moore-Stagner, during the 1960s when her father was serving in the army. The couple later divorced, and Gloria remarried before her death in 1982.

Blue Sky was released on September 16, 1994 to generally positive reviews from critics, with Lange's performance receiving critical acclaim. However, the film emerged as a commercial disappointment at the box-office, grossing only $3.4 million worldwide against a budget of $23 million.

Blue Sky won Lange the Academy Award for Best Actress, the Golden Globe Award for Best Actress in a Motion Picture – Drama and a nomination for the Screen Actors Guild Award for Outstanding Performance by a Female Actor in a Leading Role. She became the second actress, after Meryl Streep, to win the Academy Award for Best Actress after previously receiving the Academy Award for Best Supporting Actress (for Tootsie (1982)), an achievement that was not repeated until nearly 20 years later by Cate Blanchett.