She left Brazil at the age of 10, settling in Manhattan, New York City, where she studied at the Convent of the Sacred Heart and graduated from the Professional Children's School. In the film about strange occurrences involving the teachers of an Ohio high school, Brewster played a popular vindictive cheerleading captain and an editor in chief of the student paper.
Brewster starred with Cameron Diaz and Christopher Ecclestone in the independent drama The Invisible Circus (2001), portraying a grieving teenage girl who travels to Europe in 1976 in search of answers to the suicide of her older sister.
There's Amy; the model agent, Max; the leader, Janet; the ditzy one, and my favorite; Dominique; the French agent who constantly smokes, drinks black coffee, wears the shortest skirts, has sex, and speaks a combination of French and English.
She made her acting debut in an episode of All My Children in 1995 and next took on the recurring role as Nikki Munson in As the World Turns, garnering a nomination for Outstanding Teen Performer at the 1997 Soap Opera Digest Award.
Despite largely negative reviews, the film made US$51 million worldwide.
Brewster had a four-episode arc between 20 on the NBC television series Chuck, as Jill Roberts, the title character's ex-girlfriend from Stanford.
Brewster is a direct descendant of Mayflower passengers William Brewster and Edward Doty. For her performance, she was nominated for Outstanding Teen Performer at the 1997 Soap Opera Digest Awards.