Leah Marie Remini (; born June 15, 1970) is an American actress, author, former Scientologist and current anti-Scientology activist. She played Carrie Heffernan on the long-running CBS comedy series The King of Queens (1998–2007) and Lara Campbell in the film Old School, as well as co-hosting The Talk in 2010–11. She is currently involved in and hosting the Emmy Award–winning documentary series Leah Remini: Scientology and the Aftermath.

Raised as a member of the Church of Scientology from childhood, Remini left the organization in 2013 and began public criticism of Scientology. Two years later, she released Troublemaker: Surviving Hollywood and Scientology, her memoir about her experience with Scientology and reasons for leaving it. In 2016, she followed up her memoir with an Emmy Award–winning documentary television series on the A&E network, Leah Remini: Scientology and the Aftermath, to highlight other former Scientologists' experiences. After a successful first season, the series was renewed by A&E, and the second season debuted in late summer 2017. On March 14, 2018 A&E announced that the series would return for a third season. Since May 2017, Remini has also starred in the 2016 television sitcom Kevin Can Wait as Vanessa Cellucci, alongside Kevin James, her former co-star on The King of Queens, which was later cancelled after two seasons.