Actually, this is not true. His name is Ira Keeler. From allearsnet.com, " At the end of the film, as your transport comes to a standstill, there is an actor in a control booth that resembles Star Wars creator George Lucas -- but in fact it is just a look-alike." And from wikipedia.org, "Ira Keeler .... cameo as supervisor who ducks under desk at the end of the ride-- mistaken by many to be George Lucas himself (uncredited)."
Yes, the bride's name is Constance and her 5th husband is George. Now that they have the bride in the attic, they've linked her/him with the picture in the shrinking room of the woman on the tightrope above the tomb stone which has his name on it, with the hatchet in his head.