Harry and Meghan have welcomed a baby boy, a post on their official Instagram account confirmed.
The statement said: "We are pleased to announce that Their Royal Highnesses The Duke and Duchess of Sussex welcomed their firstborn child in the early morning on May 6th, 2019. Their Royal Highnesses' son weighs 7lbs. 3oz.
"The Duchess and baby are both healthy and well, and the couple thank members of the public for their shared excitement and support during this very special time in their lives.
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"More details will be shared in the forthcoming days."
Buckingham Palace said Harry was present for the birth.
The palace added: "The Queen, the Duke of Edinburgh, the Prince of Wales, the Duchess of Cornwall, the Duke and Duchess of Cambridge, Lady Jane Fellowes, Lady Sarah McCorquodale and Earl Spencer have been informed and are delighted with the news.
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"The duchess's mother, Doria Ragland, who is overjoyed by the arrival of her first grandchild, is with their Royal Highnesses at Frogmore Cottage."
The new arrival is the Queen's eighth great-grandchild.
According to the BBC, the baby is seventh in line to the throne, behind the Prince of Wales, the Duke of Cambridge and his children - Prince George, Princess Charlotte and Prince Louis - and the Duke of Sussex.
The couple have not yet announced the name of their son, although many have specualted that Meghan's American background may mean they won't necessarily go for a traditional British name as many royals have done traditionally.
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Jessica Bridge from Ladbrokes told LADbible last year: "Given this child will be in line to the throne, it's probably a safe assumption that the couple will opt for a regal name that has been used in the royal family over the generations.
She added: "However, with Meghan's USA roots it would be remiss of bookmakers to rule out an American moniker featuring somewhere."
The Duke and Duchess of Sussex announced they were expecting their first child in October last year, having tied the knot five months earlier in May.
"Their Royal Highnesses have appreciated all of the support they have received from people around the world since their wedding in May and are delighted to be able to share this happy news with the public," Kensington Palace tweeted at the time.
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Recently, excitement surrounding the baby's springtime arrival mounted when Harry and Meghan launched their own official Instagram channel under the handle @sussexroyal.
One post detailed the couple's wishes surrounding baby gifts, urging the public to make donations to select charities.
"The Duke and Duchess of Sussex are immensely grateful for the outpouring of love and support in anticipation of the birth of their first child," the post said.
"In lieu of sending gifts, the couple have long planned to encourage members of the public to make donations to select charities for children and parents in need. If you already made a donation, the couple send you their greatest thanks.
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"If you are thinking about it, they ask that you kindly consider the following organisations they've selected, which we will highlight here over the next few days: @thelunchboxfund @littlevillagehq @wellchild @baby2baby.
"The Duke and Duchess remain appreciative for your warm wishes and kindness during this especially happy time in their lives! Thank you for sharing the love."
Congrats, Harry and Meghan!
Featured Image Credit: PATopics: UK News, Royal Family, Prince Harry, Meghan Markle