Meghan, the Duchess of Sussex, has given birth to a boy, she and Prince Harry announced on their Instagram account Monday.

“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,” it said.

“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. More details will be shared in the forthcoming days.”

The Duchess went into labour early Monday, the palace said. It would not confirm where, but said Harry was by her side.

The baby will be seventh in line to the British throne behind Prince Charles, Prince William and his three children and Prince Harry.

He will be the seventh great-grandchild for Britain's Queen Elizabeth II.

Harry and Meghan married in a star-studded ceremony at Windsor Castle last May and announced they were expecting a baby in October – the news came as they touched down in Australia for their first overseas tour as a married couple.

The couple preferred to keep details of the pregnancy under wraps, in line with their repeated requests for privacy since they began dating years ago.

Meghan and Harry's new baby will make history by becoming the first biracial British child in the royal family, a significant milestone both across the Commonwealth and within British society.