The Duke and Duchess of Sussex have kept many details of their son Archie secret since his birth in May.
The royal couple kept their son's christening private from the public apart from a small selection of official photos which were shared to their Instagram account.
And unlike the other royals, Meghan and Harry have chosen to keep Archie's godparents secret too.
Usually, royals share details of their children's godparents following their christenings.
However, Meghan and Harry didn't announce who they had picked to be godparents to Archie, who is seventh in line to the throne.
But, according to royal expert Katie Nicholl, Meghan dropped a clue about one of her son's godparents during a recently royal outing.
The Duchess returned to work after her maternity leave by celebrating her Smart Set clothing collection, which she made in partnership with Marks & Spencer, John Lewis & Partners and Jigsaw to help the charity.
The organisation supports unemployed women through interview coaching and personalised styling.
Royal writer Katie claimed that Archie's godmother Isabel May was at the event.
She’s a great friend of the Duchess’ and of course she would have known all about this launch.
She told Entertainment Tonight: "I was there at the launch and spotted in the audience Isabel May.
"Who is in fact Archie’s Godmother although that’s been kept very, very quiet. She’s a great friend of the Duchess’ and of course she would have known all about this launch."
Earlier this year, it was reported that Isabel was one of Archie's godparents.
A source told Mail On Sunday at the time: "Izzy is one of Meghan’s dearest and closest friends and she values her friendship so very much. Izzy keeps their relationship really quiet and very much under the radar.
"The time they spend together is private. She helped Meghan adjust to life in London when she moved here from Canada. Meghan relied on her a lot.
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This morning, The Duke and Duchess of Sussex’s son, Archie Harrison Mountbatten-Windsor was christened in the Private Chapel at Windsor Castle at an intimate service officiated by the Archbishop of Canterbury, Justin Welby. The Duke and Duchess of Sussex are so happy to share the joy of this day with members of the public who have been incredibly supportive since the birth of their son. They thank you for your kindness in welcoming their first born and celebrating this special moment. Their Royal Highnesses feel fortunate to have enjoyed this day with family and the godparents of Archie. Their son, Archie, was baptised wearing the handmade replica of the royal christening gown which has been worn by royal infants for the last 11 years. The original Royal Christening Robe, made of fine Honiton lace lined with white satin, was commissioned by Queen Victoria in 1841 and first worn by her eldest daughter. It was subsequently worn for generations of Royal christenings, including The Queen, her children and her grandchildren until 2004, when The Queen commissioned this handmade replica, in order for the fragile historic outfit to be preserved, and for the tradition to continue. Photo credit: Chris Allerton ©️SussexRoyal
"They are just like any two young female friends. They totally support one another and enjoy lots of social activities together."
Archie was christened inside the Queen's Private Chapel at Windsor Castle on July 6.
At the time, the palace said Meghan and Harry "enjoyed this day with family and the godparents of Archie".
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