Jeremy Renner takes Viagra by accident on 11-hour flight

"The Bourne Legacy" star Jeremy Renner was once up all night on a long flight from Los Angeles to London thanks to an embarrassing prescription mix-up.

The actor tells Jimmy Kimmel on Tuesday (July 24) that he took what he thought was an Ambien in order to get some shut-eye on the plane. But it turns out the pill his friend had given him was Viagra.

"I pop it and I realize nothing's happening, but something else was happening," he says. "Not only did I not sleep the entire flight, but there was camping happening."

"There was no walking," he adds. "If I had to go to the restroom, it was so embarrassing."

As for the pal who gave him the pill? "We're no longer friends," Renner jokes (we think).