Jill Clayburgh (April 30, 1944 – November 5, 2010) was an American actress known for her work in theater, television, and cinema. She won Best Actress at the Cannes Film Festival and was nominated for the Academy Award for Best Actress for her role in the 1978 film An Unmarried Woman. She would receive a second Best Actress Academy Award nomination for the 1979 film Starting Over as well as four Golden Globe nominations for her film performances.

Clayburgh made her Broadway debut in 1968 and starred in the original Broadway productions of the musicals The Rothschilds (1970) and Pippin (1972), and returned in 1984 for the revival of the play Design for Living. On television, she appeared in episodes of Medical Center, Maude, and The Rockford Files, before starring in the 1975 TV film Hustling, which earned her the first of two Emmy Award nominations. She received a second Emmy nomination for her 2004 guest role in the drama series Nip/Tuck, and went on to star in the drama series Dirty Sexy Money (2007–09). Her film roles included Gable and Lombard (1976), Silver Streak (1976), Semi-Tough (1977), La Luna (1979), First Monday in October (1981), Shy People (1987), Fools Rush In (1997), Running With Scissors (2006) and Bridesmaids (2011).