在这部亿万男孩剧情/喜剧片中,Starring David Walliams in a TV version of his own book, it tells the story of 12-year-old Joe who has everything he could ever want from his billionaire father Len except for a friend. The cast includes John Thomson (The Fast Show, Cold Feet) as Len and Catherine Tate (Doctor Who, The Catherine Tate Show) as Sapphire Diamond, a 40-something hand model who still likes to pretend she’s 21 and is dating Len for his money. Playing 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, opera-loving teacher. Walliams (Little Britain, Big School, Britain’s Got Talent) plays Mrs Trafe, a dinner lady at Joe’s school who is described as "dirty and old and dreadful at cooking".
Widowed factory hand Len Spud becomes a billionaire after inventing a new kind of toilet roll, Bumfresh, buying a palatial mansion, complete with staff and celebrity butler Warwick Davis, for himself and twelve-year old son Joe. Joe feels alienated by the new life-style, trying to fit in at the local school by keeping his wealth a secret and wary of Len's gold-digging new girlfriend Sapphire Diamond. Unfortunately Len reveals Joe's identity and he is surrounded by greedy new 'friends', with his one true friend Bob feeling betrayed and refusing to take his money. Consequently Joe decides to use his money to do good but then something happens to provide Len with a wake-up call to make things better between him and his son.