Prince Harry and Meghan Markle’s royal wedding day was one to remember – and it seems that some fans have only just noticed a hidden message on one of the cars.

Prince Harry and Meghan Markle leave for their evening reception on their wedding day. (Image: Getty Images)

Six years ago, royal enthusiasts were eagerly anticipating the grand wedding of Prince Harry and Meghan Markle.

The couple exchanged vows on May 19, 2018, at St George’s Chapel in Windsor and fans relish revisiting the stunning images and footage from the day, from the moment the radiant couple said “I do” to their enchanting carriage ride around Windsor.

A memorable highlight was when Meghan slipped into a gorgeous Stella McCartney halter neck dress for the evening reception at Frogmore House. The couple left Windsor Castle in a blue Concept Zero E-type Jaguar, with Prince Harry behind the wheel.

This classic sports car, originally manufactured in 1968, has been converted to run on electric power.

Eagle-eyed fans have now discovered a hidden message on the couple’s wedding car, which has now been deciphered. Briefly visible in the footage, the car’s registration plate reads E190518.

Fans have pointed out that the car’s number plate carried a special message. (Image: AFP/Getty Images)

It is thought that the ‘E’ stands for established, followed by the date of their wedding – 19/05/18.

One fan took to X – formerly Twitter – to express their surprise, writing: “Yoooo I am so embarrassed. I was watching the royal wedding for the 200th time and it’s only now that I noticed the licence plate.”

Another chimed in: “Wow! Hadn’t noticed. Thanks.” A third added: “Oh wow I never noticed that, good job.”

In their Netflix docuseries Harry and Meghan, the Duke and Duchess of Sussex treated fans to a treasure trove of previously unseen photographs from their post-wedding festivities at Frogmore House.

The couple shared a light-hearted moment about using a sword to slice their wedding cake, with Meghan recalling: “It was great. It was all so over the top.

“Most people were like, ‘What is happening? Elton John is performing? ‘ I couldn’t find my mum. She’d made a beeline for the stage to watch Elton sing.”

The episode also featured guests congregating outdoors to enjoy a spectacular fireworks display.

While it remains a mystery how the Sussexes will celebrate their upcoming sixth wedding anniversary this Sunday, speculation abounds.

However, it’s expected that the couple will observe the occasion in private, likely with their children, Archie and Lilibet, by their side.