The 49-year-old actress was linked with the 'Captain America' star after they were spotted dining together with a group of friends.
"You guys are a little behind. We've since married and it started breaking apart, so we separated," Bullock told Entertainment Tonight.
"We filed for divorce, and I hope everyone can respect our privacy. But we're going to remain friends and share responsibility of the farm animals we've taken on, because you just can't abandon the animals," the 'Gravity' star said.
Evans, 32, had once called Bullock his childhood crush, saying he kept a poster of Bullock in his bedroom.