Prince Harry and Meghan's first child Archie was born at Portland Hospital in Westminster, the document confirmed, with multiple media reports claiming Meghan spent just a brief amount of time there after a last minute dash from their home at Frogmore Cottage in Windsor.
When Kate Middleton gave birth to Princess Charlotte in 2015, whose birthday is now a few days before baby Archie's, she made an appearance for the Trooping the Colour in mid-June despite being on maternity leave.
It states his dad Harry's full name as His Royal Highness Henry Charles Albert David Duke of Sussex, as mum Meghan as Rachel Meghan Her Royal Highness The Duchess of Sussex.
The Los Angeles-based entertainment news and photo agency Splash News has apologized and agreed to pay "substantial damages" to Prince Harry after it flew a helicopter low over his rural retreat home and shot photos into the living room and bedroom.
The world has been all about baby Archie Harrison Mountbatten-Windsor since he arrived on May 6. When a couple is married, only one parent is required on the register.
Until now, the duke and duchess - who celebrate their first wedding anniversary on Sunday - had been trying to keep the birth location private and details of their medical staff a secret.
The Duke and Duchess of York chose to have Princesses Beatrice and Eugenie at the Portland while Victoria Beckham had her sons Brooklyn and Romeo there.
This would free up the royal residence for a new family - potentially the Sussexes.
The role of the Royal Family - which includes Prince Harry and Markle - is to assist the Queen in carrying out her duties and also to work in areas of public and charitable service, according to the official website of the British Royal Family. "This is the first Mother's Day for The Duchess of Sussex".