Cooper and Waterhouse held hands backstage. (Jeff Kravitz/FilmMagic)
The Academy Award nominee showed up to L.A.'s Sony Pictures Studios for the taping, joined by his model girlfriend Suki Waterhouse.
Cooper, flaunting a short haircut, and Waterhouse mingled with stars such as Amy Adams, his co-star in the upcoming movie "American Hustle," as well as Mark Wahlberg, Henry Cavill, Ben Affleck, Jamie Foxx, and Jessica Alba.
Upon exit, Cooper was stormed by a bevy of female naval officers that whisked him into a photo booth, but Waterhouse didn't seem to mind. She looked on with a smile as her guy posed with the enlisted ladies.
Cooper and Waterhouse have reportedly had a romance going for a few months now, following his late 2012 split with actress Zoe Saldana.
Watch Cooper in action at the Spike Guys Choice Awards on Spike TV June 12 at 9 p.m. ET/PT.
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