Jane Therese Curtin (born September 6, 1947) is an American actress and comedian. She is sometimes referred to as "Queen of the Deadpan"; The Philadelphia Inquirer once called her a "refreshing drop of acid." She was included on a 1986 list of the "Top Prime Time Actors and Actresses of All Time."

First coming to prominence as an original cast member on the hit TV comedy series Saturday Night Live in 1975, she went on to win back-to-back Emmy Awards for Best Lead Actress in a Comedy Series on the 1980s sitcom Kate & Allie portraying the role of Allison "Allie" Lowell. Curtin later starred in the hit series 3rd Rock from the Sun (1996–2001), playing the role of Dr. Mary Albright.

Curtin has also appeared in many movie roles, including Charlene in The Librarian series of movies (2004–2008). She also reprised one of her Saturday Night Live characters, Prymaat (Clorhone) Conehead, in the 1993 film Coneheads.