Celebrities get recognised on the street all the time, so it must be awkward to be pulled aside by a fan who doesn't even know who you are.
Comedian Kevin Hart was victim of a similar misunderstanding recently, when a celeb-hunter thought he was actually Chris Rock.
Luckily Kev had his phone handy, and managed to shame the confused fan on his Snapchat story for the world to see.
Mark Ralston via Getty Images/PA
At least it's not as bad as the time Google mistook him for Bill Cosby...