Rachael Leigh Cook (born October 4, 1979) is an American actress, best known for her role in the hit romantic comedy She's All That and her "Your Brain on Drugs" PSA.
Cook was born in Minneapolis, Minnesota to Thomas H. Cook, a social worker and former stand-up comic, and JoAnn, a cooking instructor and weaver. Cook attended school at Clara Barton Open, Laurel Springs School and Minneapolis South High School. She began working as a print model at the age of 10, most notably in nationwide advertisements for Target and appearing on the boxes of Milk-Bone dog biscuits for medium sized dogs.
At the age of 14, Cook began auditioning for acting work. Her modeling agency sent her to read for a short film, 26 Summer Street (1996). She first gained national attention when she was featured in a This Is Your Brain on Drugs public-service television advertisement, in which she proceeds to destroy a kitchen with a frying pan as she lists the things that heroin harms (in 1998). Cook made her debute as an actress in the 1995 film The Baby-Sitters Club, which was based on Ann M. Martin's book series of the same name. Her second movie role was in Tom and Huck, where she portrayed Rebecca "Becky" Thatcher.