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Suki Waterhouse, Bradley Cooper

Stuart C. Wilson/Getty Images

Oh, Bradley Cooper, we can't blame you.

The actor was caught taking a peek at his girlfriend Suki Waterhouse's cleavage during an outing earlier today, and it's kinda understandable. After all, the 22-year-old beauty was flaunting her figure in a sleeveless pink Burberry dress with a plunging neckline that would make anyone—including her famous beau—break eye contact for at least a split second.

The pretty pair were photographed laughing and smiling in front of the cameras while walking the carpet at the Serpentine Gallery Summer Party at The Serpentine Gallery in London.

Suki Waterhouse, Bradley Cooper

David M. Benett/Getty Images for The Serpentine

Waterhouse paired her designer frock with Topshop platform heels. Cooper also looked very dapper and stylish in a dark navy suit with a light blue button-up dress shirt and no tie.

The Serpentine comprises two galleries situated on either side of The Serpentine lake in the heart of the Royal Park of Kensington Gardens in central London. According to the website, "The Serpentine Gallery and the newly opened Serpentine Sackler Gallery, designed by Zaha Hadid Architects, present world-renowned exhibitions of art, architecture and design throughout the year."

And it's free!

The star-studded event also included celeb appearances by Keira Knightley and hubby James Righton, Cara Delevingne and Alexa Chung.