The Duke of Sussex is due to attend the unveiling of his mother Princess Diana's statue at Kensington Palace on July 1.
The royals' congratulatory message gave a possible hint about Prince Harry and Meghan Markle's royal titles.
The couple had to attend a photocall with their son Archie just two days after the birth, as is traditional for senior royals.
The royal and her husband Jack Brooksbank welcomed their son August Philip Hawke on Feb. 9.
Buckingham Palace wants Prince William and Kate Middleton to be seen as residents of Scotland rather than visitors.
The Duke and Duchess of Sussex welcomed their daughter on June 4 at Santa Barbara Cottage Hospital in California.
The statue is William and Harry's only remaining joint project since Harry quit as a senior royal in March last year.
Meghan's estranged father Thomas Markle, who also found out about the news with the rest of the world, has congratulated the Sussexes.
A royal expert wondered why the Sussexes didn't choose Diana as the first name for their baby
Wiessler played a crucial role in providing evidence against Bashir in the inquiry into his BBC Panorama interview.
Princess Anne looked as if she wanted to "exclude" the Duchess of Cornwall by establishing a "barrier" between them.
The Prince of Wales walked Meghan down the aisle at her wedding to his son in May 2018.
With the meeting, Joe Biden will become the 13th American president to meet the Queen.
The family conflict also had an "unexpected consequence" on Kate's marriage with Prince William.
Harry and Meghan want to return to the UK next year for the 4-day celebration marking the Queen's 70 years on the throne.
The family might fly home for Queen Elizabeth II's Platinum Jubilee celebrations.
The 95-year-old and other working royals will soon embark on a year-long nationwide tour to mark the occasion.
The royal household reportedly prohibits "coloured foreigners" from working in clerical roles, only as domestic servants.
Kate has "made no secret" that she would want another child, even though her husband was "content" with three.
Meghan Markle is due to give birth to their second child anytime soon.
The Duchess was the first member of the family who was seen chatting to Harry at Prince Philip's funeral.
The Duke and Duchess of Sussex picked up name suggestions during their past royal engagements.
The bones could belong to a Native American who lived in the area centuries ago.
The Duchess of Cambridge was talking to one of the finalists of her "Hold Still" photography project when she revealed her wish.
Edoardo has a five-year-old son, Wolfie aka Christopher Woolf, with ex-fiance Dara Huang.
Instead, Harry's numerous interviews have made William see "the difference between being a celebrity and leading a life of proper public service."
The 95-year-old can be seen in several other high-profile engagements over the coming weeks, including a meeting with US President Joe Biden.
The report comes as Harry continued bashing his family during the latest episode of his and Oprah Winfrey's mental health series on Friday.
There is no jealousy between William and his wife, unlike his parents Prince Charles and Princess Diana.
The sisters got married two years apart, Eugenie in 2018 and Beatrice in 2020.