Brad Pitt in a Viagra factory

Brad Pitt. Photo / AP

Brad Pitt has been shooting scenes for his new movie in an old Viagra factory.

The Hollywood hunk has been on location at the former headquarters of the chemical company Pfizer in Sandwich, Kent in England for World War Z and the cast and crew have been jokingly looking for leftover pills - which are used to treat erectile dysfunction.

A source told The Sun newspaper: "The lads on the set have been joking about the location raising more than eyebrows.

"The cast have been opening cupboards looking for leftovers to take home with them."

Brad isn't the only actor to have a close call with the drug, Jeremy Renner recently revealed he once took Viagra by mistake because he thought it was a sleeping pill.

The Bourne Legacy actor had to take a round trip from Los Angeles to London and asked for some pills to help him sleep.

While Jeremy thought the medication he was given was sleeping tablet Ambien, it was actually Viagra, making his journey very uncomfortable.

He explained: "I had to get off the plane to go to work so I had to sleep on the plane. Somebody gave me some pills ... so great.

"I took a little sleeping pill ... and nothing was happening but something else was happening, and I saw pretty quickly that that 'A' was a little 'V' on the pill.

"Not only did I not sleep on the entire flight, I was camping. ... There was no walking. If I had to go to the restroom, it was so embarrassing."

- BANG! Showbiz