Jennifer Aniston with boyfriend Justin Theroux.

Jennifer Aniston and Justin Theroux boarded a private jet with George Clooney and Stacy Keibler on Wednesday (06-27-12).

The 43-year-old actress and her 40-year-old actor partner - as well as 50-year-old George and his 33-year-old wrestler girlfriend Stacy - got on the same aircraft in Switzerland, TMZ.com reports.

It is not known where their destination was however it marks significant progress in the friendship of screen stars Jennifer and George.

'The Ides of March' star is famously close to the former 'Friends' actress' ex-husband Brad Pitt.

George has not been spotted out with Jennifer for several years as a result.

It comes after George and Brad enjoyed dinner and drinks together at an Italian restaurant in Berkshire, England on Tuesday night (06-26-12).

The Hollywood actors went to the Pazzia eatery on the outskirts of London, which has a reputation for fine food.

George and Stacy shared a private jet with 48-year-old Brad and Angelina Jolie in January for a flight from Los Angeles to Palm Springs.

However Stacy and Angelina apparently didn't get on well.

A source told Us Weekly: ''Angelina refused to acknowledge that Stacy was even on the plane. Angelina went out of her way to ignore her, from takeoff to landing. She would not even look Stacy's way. She was not having it!''

© Bang Showbiz