The former couple has remained amicable as they co-parent their 6-year-old daughter, Lea.
Cooper wore a classic black tuxedo for fashion's biggest night, while Shayk was clad in a white Yohji Yamamoto gown. The theme of this year's Met Gala was "Karl Lagerfeld: A Line of Beauty" and celebrated the full work and life of the late designer. The dress code was "in honor of Karl."
The annual gala is a fundraiser for New York City's Metropolitan Museum of Art.
Elsewhere inside the soiree, Shayk was snapped posing for photos with Imaan Hammam, and catching up with Emily Ratajkowski, Grace Elizabeth and Vittoria Ceretti. Cooper, meanwhile, was spotted talking with Anna Wintour's beau, Bill Nighy.
Cooper and Shayk split in 2019 after four years of dating. The pair have appeared to remain on friendly terms since the breakup, even vacationing together last summer. They were most recently spotted together walking arm in arm in New York City last November.
Though Cooper and Shayk were seen together inside the Met Gala, they each opted to walk the red carpet solo.
Since welcoming their child, both Shayk and Cooper have kept her largely out of the spotlight. Last month, Shayk opened up about what they are teaching their daughter about beauty.
"Every time we send her to school, we’re like, 'Just remember kindness and love.' So I think that’s what true beauty is," she said in Harper's Bazaar.
"It’s not about putting on masks, putting on makeup, brushing your hair, putting on nice clothes. With TikTok and Instagram and social media, my daughter is growing up in a different environment than I grew up in, so sometimes it kind of scares me," she added. "But most important is teaching our daughter bigger values than being pretty on the outside."