Kirstie Louise Alley (born January 12, 1951) is an American actress and spokesmodel. She first achieved recognition in 1982, playing Saavik in the science fiction film Star Trek II: The Wrath of Khan. Alley is best known for her portrayal of Rebecca Howe on the NBC sitcom Cheers, in which she starred from 1987 to 1993, winning the Primetime Emmy Award for Outstanding Lead Actress and Golden Globe for Best Actress in 1991. From 1997–2000, she starred as the title character on the sitcom Veronica's Closet, for which she received additional Emmy and Golden Globe Award nominations.
Alley has also appeared in several movies, including Summer School (1987), Shoot to Kill (1988), Look Who's Talking (1989) and its two sequels (1990–93), Madhouse, Sibling Rivalry (both 1990), Village of the Damned, It Takes Two (both 1995), Deconstructing Harry, For Richer or Poorer (both 1997), and Drop Dead Gorgeous (1999). She received her second Emmy Award in 1994 for her performance in the television film David's Mother.
In 1997, Alley received a further Emmy nomination for her work in the crime drama series The Last Don. In 2005, she played a fictionalized version of herself on Showtime's Fat Actress. She later appeared on the reality show Kirstie Alley's Big Life (2010), and was a contestant on the twelfth season of Dancing with the Stars (2011–12), finishing in second place. In 2013, she returned to acting with the title role on the short-lived sitcom Kirstie, and in 2016 joined the second season of the Fox comedy horror series Scream Queens, playing Ingrid Hoffel.
In 2018, she finished as runner-up in season 22 of the British reality series Celebrity Big Brother.