Britain's Prince Harry and his wife Meghan Markle leave after their wedding ceremony, at St. George's Chapel in Windsor Castle in Windsor. Picture: AP

London - The world watched (22.8 million viewers to be exact) as Prince Harry finally made it official and married Meghan Markle exactly one year from Sunday.

It was a fairytale wedding that most can only dream of. And now the royal couple have gifted their many fans with a heartfelt Instagram post detailing never before seen pictures of their big day.

The video montage is a behind-the-scenes snapshot of their favourite moments.

Consisting of mostly black and white images, the duke and duchess chose a fitting gospel song This Little Light Of Mine as the musical accompaniment.

In a message to their 8.1 million followers on Instagram, they said: "Thank you for all of the love and support from so many of you around the world. Each of you made this day even more meaningful."

View this post on Instagram

Happy one year anniversary to Their Royal Highnesses, The Duke and Duchess of Sussex! Today marks the one year anniversary of the wedding of The Duke and Duchess of Sussex. Their Royal Highnesses exchanged vows at St George’s Chapel within the grounds of Windsor Castle on May 19th, 2018. The selected song “This Little Light of Mine” was chosen by the couple for their recessional. We hope you enjoy reliving this moment, and seeing some behind the scenes photos from this special day. A message from The Duke & Duchess: Thank you for all of the love and support from so many of you around the world. Each of you made this day even more meaningful. Photo credit: Chris Allerton/Joe Short (B&W); PA (color) ©️SussexRoyal (B&W images and video)

A post shared by The Duke and Duchess of Sussex (@sussexroyal) on

"There’s an ethereal Meghan, being handed her bouquet as she walks into the chapel - an arrangement of Forget-Me-Nots, sweet peas, lily of the valley, astilbe, jasmine, astrantia and sprigs of myrtle (the latter a royal tradition) artfully arranged by florist Philippa Craddock and including a few blooms handpicked by the groom," wrote the Daily Mail's Beth Hale.