During late 1999 , Timberlake made his acting debut in the Disney Channel movie Model Behavior , in which he played Jason Sharpe , a model who falls in love with a waitress after mistaking her for another model . In late 1999 , Timberlake made his acting debut in the Disney Channel movie Model Behavior . He played Jason Sharpe , a model who falls in love with a waitress after mistaking her for another model .