Actor Hayden Christensen has agreed to play the role of Phil Hellmuth, the youngest poker world champion, in the biopic "The Madison Kid". Hellmuth's friend, Bob Soderstrom, wrote the script, reports ananova.com. In 1989, the 24-year-old Hellmuth became the youngest world champion of poker by defeating two-time defending champion, Johnny Chan, in the World Series of Poker main event. The film is expected to go on floors in May next year (2007) in Winnipeg,