This is the reason behind the scar on Kate Middleton's face

And we didn't see it until now...

Kate Middleton is one of the most talked-about women in the world, with the clothes she wears selling out in minutes, and the fashion brand websites that sell them crashing due to the Kate Middleton effect.

From her favourite fashion brands and beauty preferences to busy life being a hands-on mother of three and the most recent controversy from the release of Prince Harry's memoir, the Princess of Wales never fails to make viral news.

This week, the internet was consumed by an old story however - Kate's facial scar and where she got it. 

For those who hadn't spotted it, the 40-year-old has a 3 inch long thin scar on her left temple, just above her hairline.

But where did the Princess of Wales get her scar? Well, the palace cleared that up, forced to address rumours around the scar back in 2011 after critics suggested it could be evidence of wig extensions.

Instead, the Princess has actually had her scar since her childhood.

"The scar is related to a childhood operation", a palace spokesperson told E! News back in 2011.

It is not known what the procedure was actually for, but it does not seem to be related to anything that the royal is still dealing with.

Well that's that.