Kirsten Louise "Kirstie" Alley (born January 12, 1951) is an American actress known for her role in the TV show Cheers, in which she played Rebecca Howe from 1987–1993, winning an Emmy as the Outstanding Lead Actress in a Comedy Series for 1991.

Alley is a long standing member of the Church of Scientology and spokesperson for its anti-psychiatry group, the Citizen's Commission on Human Rights, (CCHR).