Lilibet is the name of the daughter of Prince Harry and Meghan Markle, the Duke and Duchess of Sussex. She was born on June 4, 2021, in Santa Barbara, California. Her full name is Lilibet Diana Mountbatten-Windsor, honoring her great-grandmother, Queen Elizabeth II, whose family nickname was Lilibet, and her grandmother, Princess Diana. Lilibet is the younger sister of Archie Mountbatten-Windsor, who was born in 2019. The name Lilibet reflects the couple's desire to maintain a connection to their royal heritage while also establishing their own family identity in the United States.