How Amy Schumer Got Her Dream Cast for 'Trainwreck'

ET went behind the scenes of Trainwreck with Amy Schumer and LeBron James.

When she wrote Trainwreck, Amy Schumer never thought she'd be starring in it and she was pretty sure LeBron James would never accept the role she'd written for him. Fortunately, she was wrong on both counts and couldn't be happier about it.

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Fans have Judd Apatow partly to thank for the all-star cast. He was the one who championed Amy to play the starring role, which is loosely inspired by her life, and he also played a role in getting the four-time NBA MVP co-star on board.

"I made a stop in Los Angeles to pay the Lakers and Judd and Bill [Hader] came by the hotel," LeBron told ET. "They pitched me the part of the movie Trainwreck and I accepted. I gave an early yes and was kind of nervous. I've never done anything like this."

The movie stars Amy as an uninhibited woman who struggles to maintain a monogamy-free lifestyle when her co-star, Bill, enters the mix. LeBron plays Bill's friend and confidante.

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"They were like, 'You're going to play yourself.' I was like, 'Okay, I can do that easily.' I can just show up, 'Hey, I'm LeBron. I can play basketball. I can shoot some jumpers. I can dunk,'" he said. "It was like, 'No, you're actually going to be Bill's best friend in the movie, and you're going to be a love doctor. I'm like, 'Oh, so that means I'm going to have lines? Like more than one per scene?'"

Trainwreck opens July 17.

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