If we’re talking honestly (and yes, this is a safe space) there’s not a lot we don’t know about the 2003 Christmas-themed movieLove Actually.

We know how much Claudia Schiffer was paid for her 60-second cameo (hint: it’s a lot).

We know about the on-screen romance that actually trickled over into real life. And we know which scene Hugh Grant hated filming the most.

LISTEN: Looking for a Christmas movie that isn’t Love Actually? Michelle Andrews does her absolute best to sell us on ‘A Moody Christmas’.

But, surprisingly, 15 years after the film’s release, there’s still one fact that the internet seems to have only just discovered… and it’s blowing the minds of the movie’s most dedicated fans.

And it’s all to do with these memorable characters:

Image via Universal Pictures.

Image via Universal Pictures.

Keira Knightley appeared in the flick as Juliet, a bride who discovers her new husband's best friend doesn't hate her but has been in love with her THIS ENTIRE TIME.

And Thomas Brodie-Sangster, now ofGame of Thronesfame, plays Sam, who is experiencing the "total agony of being in love" with his classmate, Joanna.

Considering one character is walking down the aisle, and the other is attempting to land a kiss on the cheek from his first crush, it's only natural to assume the age difference between the two actors in the film is... at least a decade. Possibly even more.

But, internet sleuths have this week uncovered that the two actors were just FIVE YEARS apart when shooting the film.

Yep, Keira was 18 when she played Juliet. And Thomas was a very child-like 13.

HOW IS THIS POSSIBLE?!

Fans were quick to share their shock at learning the astonishing fact behind one of the world's most beloved romantic comedies:

I’m struggling to believe this how can this be true what on earth did they do to him

— naomi (@naomiatkinson_) February 11, 2018

no kidding, my sister and I were talking about him today and I genuinely said “yeah he was like 6 in Love Actually” ........

— caro (@tempestbws) February 10, 2018

Deeply upset by this information

— Jane (@probsnottbh) February 11, 2018

It's official: we'll never watch "little" Sam's scenes the same way ever again.

LISTEN to the latest episode of Mamamia's pop culture and entertainment podcast, The Binge: