Jane Therese Curtin (born September 6, 1947) is an American actress and comedienne. First coming to prominence as an original cast member on Saturday Night Live in 1975, she would go on to win back-to-back Emmy Awards for Best Lead Actress in a Comedy Series on the 1980s sitcom Kate & Allie. Curtin later starred in the hit series 3rd Rock from the Sun. She recreated her SNL character for the film The Coneheads and has more recently appeared in The Librarian: Return to King Solomon's Mines.

Curtin was born in Wellesley, Massachusetts, the daughter of Mary Constance (née Farrell) and John Joseph Curtin, who owned an insurance agency. She is a cousin of actress and writer Valerie Curtin.

Curtin holds an associate degree from Elizabeth Seton Junior College in New York City. Curtin lives in Connecticut with her husband, Patrick Lynch. The couple has one daughter, Tess Lynch. She has served as a U.S. Committee National Ambassador for UNICEF. In 1968, Curtin decided to pursue comedy as a career and dropped out of college. She joined a comedy group, "The Proposition", and performed with them until 1972. She starred in Pretzels, an off-Broadway play written by Curtin and Fred Grandy, in 1974.