Shelley Long (born August 23, 1949) is an American retired actress, singer, and comedian. For her role as Diane Chambers on the hit sitcom Cheers, she received five Emmy nominations, winning in 1983 for Outstanding Lead Actress in a Comedy Series. She also won two Golden Globe Awards for the role. She reprised her role as Diane Chambers in three episodes of the spin-off Frasier, for which she received an additional guest star Emmy nomination.

She has starred in several films including Night Shift (1982), Irreconcilable Differences (1984), The Money Pit (1986), Outrageous Fortune (1987), Hello Again (1987), Troop Beverly Hills (1989), The Brady Bunch Movie (1995), A Very Brady Sequel (1996), and Dr. T & the Women (2000). While working on Cheers, she continued to appear in motion pictures. In 1984, she was nominated for a Best Leading Actress Golden Globe for her performance in Irreconcilable Differences. She also starred in the comedies The Money Pit and Outrageous Fortune. She was offered lead roles in Working Girl, Jumpin' Jack Flash, and My Stepmother Is an Alien but did not accept them. She was also offered the role of Mary, the mother in Steven Spielberg's E.T. the Extra-Terrestrial, but turned it down because she had already signed on to appear in Night Shift.