'The Odyssey' star Matt Damon reveals brutal six-month transformation behind Christopher Nolan film

Matt Damon dropped to 167 pounds on a gluten-free diet and grew a real beard for a year to play Odysseus in Christopher Nolan's "The Odyssey."

Matt Damon dropped to 167 pounds on a gluten-free diet and grew a real beard for a year to play Odysseus in Christopher Nolan's "The Odyssey."