Samuel West has revealed that his Hyde Park On Hudson co-star Bill Murray used to bring the party spirit on set.
"He travels with his own boombox. You can hear him coming," he said.
"You can't miss it. It's a big speaker with a handle," she said.
"He gives his twinkly winks and frantically everyone's working and they're busy, and he presses play, and trance music, or Russian or church music, random stuff comes out of it. You can watch all the staff dancing," she added.
:: Hyde Park On Hudson is in cinemas now.