Sir Paul McCartney was a recent guest on Late Night and backstage he accidentally bumped into host Jimmy Fallon which caused them to “switch accents.” Fallon briefly spoke in the former Beatle’s British accent (“I sound like a Beatle. I can say anything. I’m from Liverpool! Let’s have a spot of tea and drive on the wrong side of the road!”) and McCartney spoke in an American one.
Jimmy Fallon and Paul McCartney Swap Accents