Jennifer Aniston struggled to cover her shock when she bumped into her former boyfriend, Vince Vaughn, at a recent US awards party.
It has been claimed that 'The Break-Up' co-stars were quite serious about each other, but the end of their relationship wasn't the most amicable.
A source told Heat magazine that the Hollywood actress, who is set to marry Justin Theroux, didn't know Vaughn would be there, the Herald Sun reported.
The insider asserted that Aniston was shocked, but she managed to cover it up with a smile and a quick hello.