Though they briefly re-sparked split rumors by arriving at the 2014 Met Ball separately, Bradley Cooper and Suki Waterhouse have once again proven their relationship is still going strong by attending an after-party together.

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Cooper, 39 and Waterhouse, 22, were spotted leaving Rihanna's after-party at the Up and Down club hand-in-hand. While Cooper still sported the tuxedo he wore earlier in the evening, though Waterhouse had changed out of her multi-layered Burberry gown.

The couple did not pose together on the red carpet at the event.

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Cooper also found himself the target of some criticism after sporting his larger frame and fuller face, results of a 40-lb. bulk-up in order to play the role of Navy SEAL Chris Kyle in an upcoming Clint Eastwood film. Publications including The Daily Mail even went as far as comparing him to his former Hangover co-star, Zach Galifianakis.

However, the weight gain doesn't appear to be a bother for his beautiful model girlfriend, as reports have also surfaced that she is considering moving in with her boyfriend in Los Angeles.

"They've been dating for a year now and things are getting more serious between them. It's just a case of whether or not they're both ready to take it to the next level," sources said.

Moving in would be a big step for the couple, who spend a large amount of time apart due to Waterhouse's career taking off abroad.

"Suki's career is flying in London. She's one of the hottest people on the London fashion scene and doesn't want to lose momentum," sources said. "But Bradley is keen for them to live closer together, and has his home and production company, 22, in LA. He's trying to tempt her to move so they won't have to fly around the world to see each other."

Waterhouse recently arrived back in the States after touring with fellow model and BFF Cara Delevingne in Shanghai and London.