The Duke and Duchess of Sussex have marked their first wedding anniversary with a photo montage on Instagram.

Harry and Meghan shared a compilation of 14 wedding snaps including some behind the scenes pictures from their big day last year.

The couple – who welcomed baby Archie earlier this month – have had a momentous 12 months since they wed at St George’s Chapel in a glittering ceremony attended by royalty, celebrities and the public.

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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 (B&W); PA (color) ©️SussexRoyal (B&W images and video)

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The social media post, which features some never seen before pictures, is accompanied by the song This Little Light Of Mine which they point out was chosen by the couple for their recessional on their wedding day.

In a message, the couple 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.”

The pictures feature a series of black and white images by Chris Allerton, including one that appears to be Harry thumbing a lift and another where Meghan is holding hands with her mother Doria Ragland.

The famous picture of the couple sharing a kiss on the steps, by Press Association photographer Danny Lawson, is also among the snaps shared.

Harry and Meghan outside St George’s Chapel
Harry and Meghan outside St George’s Chapel (Jane Barlow/PA)

The birth of Harry and Meghan’s son came less than a year after the royal nuptials in the grounds of Windsor Castle, a wedding attended by A-list stars like Oprah Winfrey and George and Amal Clooney and the British monarchy led by the Queen and the Duke of Edinburgh.

Harry, 34, and Meghan, 37, got engaged following a whirlwind 16-month romance after going on a blind date in London.

Meghan and Harry in 2017
Meghan and Harry in 2017 (Danny Lawson/PA)

Meghan’s wedding dress designer Clare Waight Keller posted a throwback video clip, showing the bride stepping out of the car and her veil being arranged before she walked up the chapel’s steps in front of adoring crowds.

Alongside the Instagram post wishing the couple a happy anniversary, Ms Waight Keller wrote: “A day and an event in my life I will never forget, it was truly so extraordinarily beautiful and an honour and privilege to be part of a moment in history and their lives.”

A first wedding anniversary is traditionally celebrated with paper gifts – with couples sometimes exchanging presents featuring a paper ticket.

Meghan’s mother Ms Ragland – now a grandmother for the first time – is thought to be staying with the couple and could perform babysitting duties if the duke and duchess choose to have a romantic dinner to mark their anniversary.

Meghan with her mother Doria Ragland
Meghan with her mother Doria Ragland (Steve Parsons/PA)

Archie’s birth was registered on Friday, revealing the couple had their baby at London’s Portland Hospital, a private hospital favoured by celebrities wanting a money-no-object birthing experience.

The baby, who is the seventh in line to the throne and an eighth great-grandchild for the Queen and Philip, arrived at 5.26am on May 6, weighing 7lb 3oz.

He is believed to be the first mixed-race child born to a senior member of the Royal family in centuries, and is a reflection of modern Britain with its culturally diverse population.

Meghan and Harry show off baby Archie
Meghan and Harry show off baby Archie (Dominic Lipinski/PA)

The birth certificate also showed Meghan may have been born a commoner but is now a “Princess of the United Kingdom” as far as her occupation was concerned.

When Harry announced to the world his wife had given birth to a boy he could not hide his happiness at becoming a father for the first time, to a baby he said was “absolutely to die for”.

The royal baby, who was not given a courtesy title, met his uncle and aunt, the Duke and Duchess of Cambridge, for the first time on Tuesday, having already spent time with his royal great-grandparents, the Queen and Philip.