Julie Hagerty (born June 15, 1955) is an American actress and former model.

Hagerty was born in Cincinnati, Ohio, the daughter of Harriet Yuellig, a model and singer, and Jerry Hagerty, a musician. Her brother Michael Hagerty (1951–1991) was also an actor. Her parents later divorced. Hagerty attended Indian Hill High School. She was signed as a model for Ford Models at 15 and spent summers modeling in New York City. She moved there in 1972, and worked at her brother's theater group, and also studied with actor William Hickey.

Hagerty made her off-Broadway debut in 1979, starring in Mutual Benefit Life at her brother's theater, "The Production Company". She continued appearing on stage, including starring in a Broadway version of The House of Blue Leaves. Her first film role was in All That Jazz, but her small part was cut out of the finished film. She was subsequently cast in the parody film, Airplane!. It was released in June 1980 and became the highest-grossing comedy in box office history, a distinction that held until Ghostbusters (1984). The film was considered the first of the modern parody genre, and established Hagerty as a noted comedic actress.