Bullock sparkled in a champagne-colored Elie Saab dress with sequin detail and feathers at the shoulders. The actress plays Debbie Ocean, the sister of Danny Ocean (George Clooney), in the new film.
Rihanna, meanwhile, dazzled in a purple, metallic Givenchy dress with ruffle and pleat detail. The singer and actress matched her eyeshadow and lipstick to the shade of her dress.
Ocean's 8 follows Debbie and her crew as they plan and stage a heist at the Met Gala. The cast confessed to stealing at different points in their lives in an interview with Entertainment Tonight at the premiere.
"It was in the candy family," Bullock said. "I was young and didn't know any better."
"I stole Chinese food," Rihanna added, saying the details are a "long story."