Oscar-nominated actor Robert Downey Jr. married yesterday his longtime girlfriend, movie producer Susan Levin on Long Island, People magazine reports on its Web site.

Among the celebrities invited to celebrate the wedding were Keanu Reeves and musicians Sting and Billy Joel, who also performed.

Robert has been previously married with Deborah Falconer, a marriage that ended in divorce on April 26, 2004. They have a son named Indio.

Downey, 40, has starred in more than 50 films, including "Less Than Zero", "Chaplin", "Only You", "Natural Born Killers" and "Gothika".