In pictures: Celebrities, family arrive for Harry and Meghan's Windsor wedding

Britain's Prince Harry and his US fiancée Meghan Markle stand together for their wedding in St George's Chapel, Windsor Castle, Windsor, on May 19, 2018. Dominic Lipinski / POOL / AFP

Celebrities from both sides of the Atlantic, from Oprah Winfrey and George Clooney to the Beckhams and Carey Mulligan, joined the British royal family to celebrate the wedding of Prince Harry and Meghan Markle at Windsor Castle on Saturday.