“Congratulations to The Duke and Duchess of Sussex on the birth of Lilibet Diana! The Queen, The Prince of Wales and The Duchess of Cornwall and The Duke and Duchess of Cambridge are delighted with the news,” Queen Elizabeth’s official Twitter account tweeted alongside a photo of the Duke and Duchess of Sussex from their 2018 wedding. “Lilibet is Her Majesty’s 11th great-grandchild.” The Cambridges and Prince Charles shared additional congratulatory posts on their respective social media accounts. Clarence House marked the birth of the Prince of Wales’ second granddaughter with a message that read: “Congratulations to Harry, Meghan and Archie on the arrival of baby Lilibet Diana,” adding, “Wishing them all well at this special time.” Meanwhile, Prince William and Kate Middleton shared a previously released black-and-white photo of the Sussexes with their son Archie Harrison, which was captioned: “We are all delighted by the happy news of the arrival of baby Lili. Congratulations to Harry, Meghan and Archie.” Prince Harry’s cousin Princess Eugenie, who welcomed her first child—son August Brooksbank—earlier this year, also celebrated the royal baby’s arrival on her personal Instagram story writing: “Congratulations dear cousins.. we couldn’t be happier for you all.” Meghan and Harry announced the birth of their daughter on June 6. Archie’s little sister was born two days prior at the Santa Barbara Cottage Hospital in Santa Barbara, CA. Lili was named after her great-grandmother Queen Elizabeth, whose family nickname is Lilibet, while her middle name is a tribute to Harry’s late mother, Princess Diana. In a statement, the Duke and Duchess of Sussex said, “On June 4th, we were blessed with the arrival of our daughter, Lili. She is more than we could have ever imagined, and we remain grateful for the love and prayers we’ve felt from across the globe. Thank you for your continued kindness and support during this very special time for our family.” Next, find out who’s playing Meghan Markle and Prince Harry in Lifetime’s Harry & Meghan: Escaping the Palace!