Matt Damon Told Josh Hartnett Not to Gain Any Weight for ‘Oppenheimer’ Role, but Hartnett Had Already Packed on 30 Pounds: ‘Just So Unhelpful’

> “[Matt] gave me a lot of good advice. One in particular — one thing that was just so unhelpful: he told me not to gain the weight I’d already gained for the role,” Hartnett said. “I gained about 30 pounds for the role, and he was like, ‘You’re never gonna get that off again, man.’”