In 1976, when Lukather was nineteen years old, he was invited by his high school friends David Paich and the Porcaro brothers Steve and Jeff to join them in forming their band, Toto.
En 1976, cando Lukather tiña 19 anos, foi invitado polos seus compañeiros de instituto David Paich e os irmáns Porcaro, Steve e Jeff, a formar parte da súa banda, Toto.