Biel also played a lead role in a low-budget musical short titled It's a Digital World, but the film was never released. At age 14, after auditioning for several television pilots, Biel was cast as the oldest daughter in the family drama, 7th Heaven. The show was originally scheduled to air on Fox, but was picked up by The WB Television Network instead. 7th Heaven would go on to last for 11 seasons, making it the longest-running family drama in U.S. television history, and also became the highest-rated show on The WB.