Input (grade 13): In 2009 the unofficial biography There Will Be Rainbows: A Biography of Rufus Wainwright and the story of Loudon Wainwright and Kate McGarrigle by Kirk Lake documented Wainwright's early struggles.
Output (grade 4): He is the son of singers and performers Loudon Wainwright III and Kate McGarrigle. His sister Martha Wainwright is also a well known singer.