However, according to Entertainment Tonight, the exes 'hugged and briefly talked,' before Brad went to talk to his Ocean's 11 co-star and close friend George Clooney for the rest of the night.
According to the publication, Brad, who is currently in the process of a messy divorce with Angelina Jolie, 'wanted to support' his former wife with a source telling ET that the couple have 'been friendly' in recent years.
The site claims: "Aniston put her ex-husband on her invite list weeks ago and Pitt was in town and happily chose to attend to help her celebrate the milestone birthday."
Whilst the former couple didn’t have much interaction at the event, 'they were seen hugging each other'.