Cooper, 38, and Waterhouse coordinated their outfits, with the actor wearing a gray suit and black tie, while Waterhouse kept it simple and chic in a gray turtleneck, reported E! online.
Cooper, who plays FBI agent Richie DiMaso in 'American Hustle', sported a new haircut which he has in the movie.
The 21-year-old model had recently said that she does not like to talk about her boyfriend.
"I'm not one of those girls who goes on about their boyfriends. I do think whatever I say will sound weird. But the truth is, if it start talking about him, I probably won't be able to stop. And I don't really want to talk about him, you know?," she had said.