The 'Elephant Man' actor, who turned 40 recently, said that playing air guitar was a skill he'd honed since his days as a music-mad little boy, reported Us magazine.
"You have a little musical talent," the show host asked the hunky star, introducing the unlikely segment to the audience.
"I'm glad you said that because it's very little," Cooper agreed.
"I play air guitar. When I was a kid I had a lot of time on my hands and there's this one song by Neil Young. It's just the guitar solo from 'Down by the River'. To air guitar to it is so meaningless but I'd love to give you a little taste. It's long!" he said.