British actor Tom Hiddleston, aka Loki from Thor/Avengers, does impressions. Like this one, where he was asked at Aussie film shindig Popcorn Taxi if he could do Owen Wilson. If Owen Wilson was Loki. Sounds nutty, but boy, it's pretty good.
Incidentally, if you're ever in Sydney - or hey, live there - Popcorn Taxi is amazing. It's a series of regular events where you can sit down and watch a classic movie with its director and/or actors, then chat with them afterwards.