But despite both of them being single, Clooney insists the fact Bullock once hooked up with one of his friends takes her out of the running as a potential girlfriend.
"She was dating one of my best friends. There's a certain bro code, you know what I mean? I've known her a long, long time," he said.
Clooney, 52, recently split with girlfriend Stacey Keibler.