I've not even seen Mr George Bryant yet

The walls of a small restaurant were covered with numerous photographs of the world-famous people, mostly film stars and people from the musical world. All the photographs were suitably framed, and each of the people had written under his or her picture a message of love or thanks to the owner of the restaurant, George Bryant.
Mr Franks often dined in this restaurant, and was always very impressed by the photographs, but the entire time he was there, he never saw any of the people from the world of film whose pictures were on that wall, so one day he said to one of the waiters, "When do those famous people come here?"
The helpful waiter answered, "Although I've worked in this restaurant for ten years, I've not even seen Mr George Bryant yet!“

This is a joke. Could you tell me what is so funny here?