Prince William and Kate Middleton led the royal congratulations for Meghan Markle and Prince Harry's baby news Sunday.
After the couple announced the birth of their second child, daughter Lilibet "Lili" Diana Mountbatten-Windsor, the Duke and Duchess of Cambridge shared a personal message.
"We are all delighted by the happy news of the arrival of baby Lili," Prince William and Duchess Kate wrote on their official Instagram account, along with a maternity shoot photo of the couple holding their son Archie, 2. "Congratulations to Harry, Meghan and Archie."
Meghan welcomed her second child at 11:40 a.m. Friday at Santa Barbara Cottage Hospital. The new royal addition is named after Queen Elizabeth II, whose family nickname is "Lilibet." The middle name, Diana, "was chosen to honor her beloved late grandmother, The Princess of Wales," a release from the couple noted.
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Prince William and Duchess Kate also chose Elizabeth and Diana as middle names for their daughter, 6-year-old Princess Charlotte.
During the bombshell Oprah Winfrey interview in March, Harry acknowledged his relationships with his father, Prince Charles, and his brother, Prince William, were strained by his and Meghan's unhappy 22 months as senior working royals.
Prince Charles shared separate congratulatory messages on social media Sunday from himself and wife Camilla, Duchess of Cornwall.
"Congratulations to Harry, Meghan and Archie on the arrival of baby Lilibet Diana. Wishing them all well at this special time," the post, next to a smiling picture of the family, read.
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The Instagram account for Queen Elizabeth, which highlights the work of the broader British royal family, shared a wedding photo of Harry and Meghan and sent the couple best wishes.
"Congratulations to The Duke and Duchess of Sussex on the birth of Lilibet Diana!" the post read, featuring an exclamation point. "The Queen, the Prince of Wales and The Duchess of Cornwall and The Duke and Duchess of Cambridge are delighted with the news."
The post stated that, at 95 years old, Lilibet is "Her Majesty's 11th great-grandchild."
Soon, Queen Elizabeth will welcome a 12th grandchild. Princess Beatrice, granddaughter to the queen, is expecting her first child with her husband, Edoardo Mapelli Mozzi, this fall.
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Princess Eugenie, who welcomed her first child — son August Philip Hawke — in February, paid respects in an Instagram Stories moment.
"Congratulations dear cousins… we couldn't be happier for you all," Eugenie, the youngest daughter of Prince Andrew, Duke of York, and Sarah, Duchess of York, wrote under a black-and-white photo of Meghan and Harry.
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