This is the fourth time Christian Bale has undergone an incredible body transformation and the second time he has done so in a David O. Russell film. The first was in The Machinist (2004) (for which he became extremely skinny, losing 63 pounds). Then Rescue Dawn (2006) (lost 55 pounds) and The Fighter (2010) (lost 30 pounds).
Jennifer Lawrence's penchant for snacking on Doritos chips on set caused her to stain and nearly ruin several dresses. The wardrobe department compensated by making several duplicate dresses for her to use throughout the production so she would always have a clean one to wear.
Rosalyn Rosenfeld: I knew that Pete was going to go over there and knock some sense into your head. I've been reading this book Irving. It's by Wayne Dyer. The Power of Intention. And my intention in sending Pete over to you was that so you could come up with this plan. So, you're welcome.