The Wizarding World of Harry Potter kicked off its grand opening celebration with help from "Harry Potter" film stars Tom Felton, Michael Gambon, Bonnie Wright, Oliver Phelps, Daniel Radcliffe, Matthew Lewis, Warwick Davis, Rupert Grint and James Phelps on June 16, 2010 in Orlando. Hundreds of people gathered in front of Hogwarts castle for a spectacular display of fireworks choreographed to a special performance of music from the "Harry Potter" films conducted live by renowned composer John Williams.