Rufus McGarrigle Wainwright (born July 22, 1973) is an American-Canadian singer-songwriter & composer. His parents are folk singers Kate McGarrigle & Loudon Wainwright III. He has recorded 8 albums & numerous tracks on compilations & film soundtracks. He's also written a classical opera and set Shakespeare sonnets to music. Elton John called him "the greatest songwriter on the planet". He & partner Jörn Weisbrodt are duel Daddies to daughter Viva. Lorca Cohen (Leonard's daughter) is the mother.