Jen Aniston No Fan of Clooney!

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Oscar winner George Clooney certainly has his fair share of female fans, but OK! has learned you probably shouldn't count Jennifer Aniston among them!

The handsome Michael Clayton star — who just happens to be best buds with Jen's ex Brad Pitt — sauntered up to the actress at last Saturday's Night Before gala in Beverly Hills, where she was busy chatting with BFF Courteney Cox, David Arquette, Orlando Bloom, Robert Downey Jr. and his wife, Susan, outside of Bar Nineteen12.

“George attempted to be friendly, but Jen wasn’t having it,” one eyewitness tells OK!. “After enduring a few minutes of the actor’s presence, Jen turned on her heels and made a beeline for the Sunset Ballroom, where most of the guests were mingling.”

Courteney, naturally, joined Jen, leaving her affable husband, David, to make awkward small talk with George!