Meghan Markle and Prince Harry.Photo: Karwai Tang/WireImage

Meghan, Duchess of Sussex and Prince Harry, Duke of Sussex attend the National Service of Thanksgiving at St Paul’s Cathedral

Meghan MarkleandPrince Harry’s friendMisan Harrimanshared a sweetbirthday messageforPrince Archie.

On Saturday, the photographer, entrepreneur and social activist posted animagefrom the Netflix docuseriesHarry & Meghanto mark Archie’s 4th birthday. “Wishing you the happiest of birthdays Archie ❤️” he wrote in the caption.

Harriman also appeared in the Netflix docuseries and has been involved in monumental events for the Duke and Duchess of Sussex.Prince Harry, 38, and Meghan, 41, have turned to Harriman to capture important milestones before, from their2021 pregnancy announcementtoPrincess Lilibet’sfirst birthday photosin June 2022, which Harriman and his family were guests at.

Recently, Meghansupported her “dear friend” at his TED Talks event last month.

“His lens has photographed everything from events that have changed the world, invisible moments we all desperately needed to see, along with some of the planet’s most recognizable faces,” she said in her speech. “But this was not always his path, and you might be surprised to hear not who, but what, he credits for his success. I’m so thrilled to welcome to the stage, my dear friend, Misan Harriman.”

Mike Coppola/Getty Images; David M. Benett/Dave Benett/Getty Images

Meghan, Duchess of Sussex; Misan Harriman attends the British Vogue X Self-Portrait Summer Party

Meghan stayed back home in California with Archie and 23-month-old Princess Lilibet to ring in her son’s fourth birthday whilePrince Harryattended his father’s crowning ceremony.

“It’s going to be alow-key party at home,” a source previously told PEOPLE. “They’ll have friends around them and Meghan’s mom, Doria [Ragland]. Meghan will definitely have support that weekend.”

Of course, Archie’s little sister will also be part of the festivities.

“They are so sweet together. Archie loves Lili. He’s such a sweet boy. When she’s not around, he asks, ‘Where’s Lili?’ " the source adds.

Prince Harry and Meghan Markle.Dia Dipasupil/Getty

Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend the 2021 Salute To Freedom Gala at Intrepid Sea-Air-Space Museum on November 10, 2021 in New York City

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Upon the death ofQueen Elizabethin September, Prince Harry’s father became King Charles — and as grandchildren of the monarch, Archie and Liliwere afforded the titles of prince and princess.

“The children’s titles have been a birthright since their grandfather became monarch,” a spokesperson for the Duke and Duchess of Sussex told PEOPLE. “This matter has been settled for some time in alignment with Buckingham Palace.”

source: people.com