How George Clooney Played Matchmaker for Sandra Bullock

— -- Sandra Bullock and George Clooney have always made a great team, going back to their early days in Hollywood.

While promoting her latest film, "Our Brand Is Crisis," which Clooney is producing, Bullock, 51, recalled how Clooney, 54, once served as the perfect wingman, approaching a guy she "would have liked to" have had as her "boyfriend at the time."

"George said, 'If you don't marry her, I will," Bullock told "Access Hollywood."

She was quick to add, "George is not gonna marry anybody except for Amal. He was waiting 30 years to do that."

Clooney's quick quip worked on the mutual friend, who went on to have a four-year relationship with the actress. Bullock did not reveal the identity of her former boyfriend.

"We were together for four years after that, thanks to George," she said.

Bullock, who has an adopted son Louis, has since moved on. She recently went public with new beau Bryan Randall, a model and photographer, who attended Monday night's premiere.