Celebrity: Elton John

Dog: Arthur

Breed: Cocker spaniel

Fido Facts…

Guests at the English civil-partnership ceremony of Elton John and David Furnish ranged from music superstars (Ringo Starr, Ozzy Osbourne) to sports greats (David Beckham, Boris Becker) to Hollywood types (Michael Caine, Sharon Stone), but the grooms' most important guest was their dog, Arthur. When the celebration's posh venue, Windsor's Guildhall, informed the couple that pets were forbidden on the premises, they responded by making Arthur "best man," a critical part of the proceedings that could not be banned from attending.