Vince Vaughn and Jennifer Aniston staged a mock argument for their first public appearance together.

The couple acted out the spoof bust-up during their video-link acceptance speech for their Teen Choice Movie Chemistry award on Sunday (20.08.06), which they received for their performance in 'The Break-Up'.

Vince began by saying: "We just want to thank all the voters out there who put us up for this award. When you are dealing with on screen chemistry, it isn't an equitable kind of thing..."

Jennifer then interrupted, saying: "It's not something that happens. It's something, you know..."

Vince then jumped in jokingly complaining: "I guess part of having chemistry is having someone cutting in the middle of a sentence."

Jennifer retaliated by saying: "I wasn't cutting in. I was just adding my thoughts to yours, you know, that's what chemistry is, two people talking, instead of one just talking, talking, talking.