‘Awkward’ mistake Prince William made during his own wedding day

Prince William’s wedding day mistake is only just being realised by royal fans.

Nearly 15 years have passed since the future King of England and Kate Middleton wed at Westminster Abbey on April 29, 2011.

The pair, who went on to have three children together, began their love affair when they met at the University of St Andrews in 2001.

Although friends, they decided to take the plunge just one year later - despite their relationship facing a few challenges in the early days before Prince William popped the question in 2010.

The ceremony was a major event in the UK and other nations, and people tuned in from all over the world to watch the Duke and Duchess of Cambridge (now the Wales’) say their nuptials in front of a hefty crowd of royals and celebrities as fans cheered outside the Abbey.

Prince William and Kate Middleton married in Westminster Abbey in 2011 (Anwar Hussein / Contributor)

However, a mistake on Williams' behalf was noticed by fans quite quickly after re-watching the footage of their big day.

It was when the pair got in a vintage Aston Martin as their ‘just married’ car, hilarity began inside the vehicle.

As it turns out, while the wedded couple were inside the car that was gifted to Charles by his mother on his 21st birthday, Prince William drove away with the hand brake still on.

And according to the Sun’s royal photographer, Arthur Edwards, this absolutely happened!

He revealed all to the BBC's Desert Island Discs, sharing: "I was talking to (then) Prince Charles about that. I said: 'Did you mind him borrowing your car?' Because he loves that car. It was a birthday present from his mother on his 21st birthday."

The then-Prince Charles apparently told Edwards that William had asked to use it prior to the big day.

Prince William drove the Aston Martin car with the handbrake still on (Pascal Le Segretain / Staff/ Getty Stock)

That’s when Edwards queried that something seemed to be wrong with the car, which led to King Charles explaining: "Yes. Because he didn't take the handbrake off."

Fans were quick to note that maybe William wasn’t an experienced driver at the time, with one person on social media asking: "Why has it got L Plates was he a learner."

Another said: "They're learners in the wedding as in new 'learners' in marriage. It's a British humour for us."

And someone else wrote: "For a moment I thought she was driving, then I remember they're in the UK."

Looks like even royalty can experience driving blunders!