The former couple, which shares two-year-old daughter Lea, split last summer (19) after a four-year relationship, but the stars were back together over the weekend at the British Vogue and Tiffany & Co. Fashion and Film Party, for which model Shayk served as a co-host after gracing the magazine's March cover.
And the exes were not shy about their public reunion - official photos from the event, held at Annabel's in London, were posted on social media on Monday, with one picture showing Shayk standing in between a smiling Cooper and British Vogue Editor Edward Enninful.
In her Vogue interview, Shayk offered up rare comments about her relationship with the "A Star Is Born" actor and filmmaker.
"Two great people don't have to make a good couple," she shared. "I think we've been very lucky to experience what we had with each other. Life without B is new ground."