People blown away by Mark Hamill's absolutely perfect Harrison Ford impression

Mark Hamill's impression of Harrison Ford has been dubbed 'perfect' by Star Wars fans.

Mark Hamill appeared on The Graham Norton Show in the UK and discussed when he found out one of the 'biggest secrets in cinema history' - for those of you who don't know the big Darth Vader secret, firstly, what have you been doing all these years? And secondly, please turn away now.

And while Hamill's retelling of the story is absolutely riveting, viewers have been a bit distracted by his impression of Harrison Ford, which as Norton's show's YouTube channel said itself, 'Slaps'!

The 1977 hit film's sequel, The Empire Strikes Back, features one of the greatest twists in movie history - Darth Vader is Luke Skywalker's father.

If you didn't know that, then it's your own fault. We warned you. You should've turned back.

And so shocking was the plot twist, it was only revealed to a very select few.

Hamill explained he was approached by the film's director Irvin Kershner in his dressing room and Kershner said: "I'm going to tell you something. I know it. George Lucas knows it. And when I tell you, you'll know it. But if it leaks, we'll know it was you!"

Kershner then handed Hamill a piece of paper which read: "I am your father."

Getty Images/ Gustavo Caballero

Well, Hamill certainly did a good job of keeping the plot twist a secret as at the film's screening, when the moment went down in the movie, Harrison Ford had a gobsmacked reaction.

"Harrison turned to me and said, 'Hey kid, he didn't f**kin' tell me that'," Hamill says.

And Hamill's impression of Ford is so spot on, it caused the rest of The Graham Norton Show - host, guests, audience and all - to erupt into hysterical laughter.

And viewers have been quick to flock to social media in stitches too, sharing their awe at just how 'perfect' Hamill's impression of Ford is.

BBC/ YouTube/ The Graham Norton Show

One YouTube user said: "Love how dead on his imitation is! The kid just fit so perfectly too!"

"Mark Hamill does the literal best Harrison Ford impression," another added.

A third commented: "His Harrison Ford was dead on."

And a fourth resolved: "He always does a brilliant harrison ford impression."

Indeed, Hamill always does seem to do a perfect Ford impression, the actor appearing on Late Night with Seth Meyers four years ago and once more, it was almost as if Ford was in the room with him.