Starring David Walliams in a TV版 version of his own book, it tells the story of 12yearold Joe who has everything he could ever want from his billionaire father Len except for a friendThe cast includes John Thomson The Fast Show, Cold Feet as Len and Catherine Tate Doctor Who, The Catherine Tate Show as Sapphire Diamond, a 40something hand model who still likes to pretend she’s 21 and is dating Len for his moneyPlaying Joe’s shy and very nervous head teacher is James Fleet Vicar Of Dibley, Partners In Crime while Rebecca Front The Thick Of It has been cast as Joe’s firm but fair, operaloving teacher Walliams Little Britain, Big School, Britain’s Got Talent plays Mrs Trafe, a dinner lady at Joe’s school who is described as quot;dirty and old and dreadful at cookingquot;