A tonneau cover assembly provided in a vehicle including a panel hingedly attached to a vehicle seat, and a release assembly with an actuating mechanism provided on the panel. The actuating mechanism is connected to a panel lock assembly and a seat lock assembly which are provided to selectively lock the panel and the vehicle seat in place. Actuation of the actuating mechanism causes the lock assemblies to release, thereby allowing rotation of the panel about the hinged attachment and folding of the vehicle seat from a seating position to a folded-forward position.