The 34-year-old The Danish Girl star was caught on camera casually hanging out on a Circle Line train heading towards Victoria station at rush hour.

"No one could quite believe it was him, so no one bothered him at all," an eyewitness told London's Evening Standard newspaper.

He's not the only big star who has been spotted on the Underground - Rihanna and Niall Horan have also used public transport to get around London.