In order to play British race car driver Ken Miles, Bale had to lose the weight he gained for Vice. However, he ended up losing even more weight because, as he explained to Variety, "I had to get in the car. I could not bloody...–these things are not made for comfort, these cars. They’re tight. So, I couldn’t bloody get in them."

Bale's co-star Matt Damon was amazed by Bale's 70-pound weight loss, but when Damon asked him how he did it, he got a very succinct answer: "He just looked at me and said 'I didn’t eat.' That guy is cut from a different cloth."