Matt Damon and George Clooney turn up at Cambridge Gym

Hollywood pals Matt Damon and George Clooney stunned regulars at a council-run gym in Cambridge, when they turned up for a free work-out session.

The surprise appearance comes just days after the A-Listers brought a sleepy Buckinghamshire village to a standstill whilst filming scenes for Clooney’s upcoming ‘Monument Men’.

[Clooney and Damon bring village to standstill]

‘Bourne’ star Damon was the first spotted working up a sweat at the Kelsey Kerridge Sports Centre in Cambridge on Saturday evening. He did an hour-long session on the weights and exercise machines and then posed for photos with star-struck staff.

Amazingly Matt then returned with to the gym the next day, this time with co-star and director Clooney in tow. They were filming at the nearby Imperial War Museum at Duxford.

They reportedly asked staff if they could use the sports hall, where they played basketball with their bodyguards for an hour.

Despite solid spots on Hollywood’s affluent A-list, the stars took advantage of an offer to use the facilities for nothing, instead of paying £7.80 one-off gym fee or the £26 sports hall hire.

But, when they asked for a longer session, staff had to refuse them because the sports hall was booked.

"You do not expect to be working out next to Matt Damon,” said Manager Liane Shadrack. “It was quite bizarre.”

"He was just completely laid back, chatting to staff and members.

"It was great that he came back and brought George Clooney with him. Everyone was in shock.”

[Andrew Garfield plays basketball with kids while dressed as Spider-Man]

The movie mates reportedly rounded off their weekend in Cambridge by dining in the Loch Fyne restaurant on Sunday night - where co-star John Goodman was spotted on Thursday.

‘Monument Men’, co-starring Huge Bonneville, Bill Murray and Jean Dujardin, follows an attempt to recover treasure stolen by the Nazis.

Staff at Bedfordshire Nandos are believed to be on stand-by.