This is how Superman hides in plain sight

But <i>Superman</i> actor Henry Cavill walked around New York's Times Square in a Superman t-shirt and no one noticed. Photo / Instagram

Clark Kent's glasses disguise has always been a little hard to believe.

But Superman actor Henry Cavill has proven the Man Of Steel's trick is not entirely ineffective.

In a video posted to his Instagram on Thursday morning (AEDT), Cavill walks around unrecognised in New York's Times Square - despite the giant Batman V Superman movie posters surrounding him.

View this post on Instagram

Dear Doubter, The glasses are good enough. Regards, Superman #WhoWillWin #Superman

A post shared by Henry Cavill (@henrycavill) on Mar 16, 2016 at 11:33am PDT

Cavill can be seen smiling wryly as he stands incognito in front of a subway entrance, in the middle of the square and in a coffee shop.

He even wore a Superman t-shirt to prove his point."Dear Doubter, The glasses are good enough. Regards, Superman," he wrote to his 492,000 followers.

Fans responded with glee to the prank.

"Lol he could be having a convo with me and I would have no clue," wrote @rokitqween.

"Hahaha now you are showing off," said @taribowest55.

Clark Kent, Superman's human alter ego, wears a pair of thick glasses to hide his superhero identity.

• Batman V Superman will hit New Zealand cinemas on March 24.

- AAP