In 2003, Bryan starred as Dorinda "Do" Thomas in the Disney Channel Original Movie "The Cheetah Girls", a musical comedy based on the bestselling series of young adult books of the same name by Deborah Gregory. The film depicts four best friends (Raven-Symoné, Adrienne Bailon, Kiely Williams, and Bryan) who form a pop group in their first year of high school for a talent show and reach unexpected success. Prior to "The Cheetah Girls", two of Bryan's castmates Bailon and Williams were members of R&B girl group 3LW. "The Cheetah Girls" premiered on August 15, 2003 to 6.5 million viewers, a huge ratings success.