Serena Williams and Alexis Ohanian arrive at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Chris Radburn/PA Wire)
James Corden and Julia Carey arrive at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Chris Radburn/PA Wire)
The Duchess of York arrives at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Gareth Fuller/PA Wire)
Sarah Rafferty arrives for the wedding ceremony of Prince Harry and Meghan Markle at St. George's Chapel in Windsor Castle in Windsor, near London, England, Saturday, May 19, 2018. (Gareth Fuller/PA Wire)
Gina Torres arrives at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Ian West/PA Wire)
Abigail Spencer and Priyanka Chopra arrive at the wedding of Prince Harry to Ms Meghan Markle. (Chris Jackson/Getty Images)
Carole, James and Pippa Middleton arrive at the wedding of Prince Harry to Ms. Meghan Markle at St George's Chapel, Windsor Castle. (Chris Jackson/Getty Images)
George and Amal Clooney arrive at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Chris Radburn/PA Wire)
David and Victoria Beckham arrive at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Chris Radburn/PA Wire)
Pippa Middleton and James Middleton arrive at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Ian West/PA Wire)
Serena Williams arrives at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Gareth Fuller/PA Wire)
David Beckham and Victoria Beckham arrive for the wedding ceremony of Prince Harry and Meghan Markle at St. George's Chapel in Windsor Castle. (Gareth Fuller/pool photo via AP)
James Blunt and Sofia Wellesley arrive at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Chris Radburn/PA Wire)
Lady Kitty Spencer arrives at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Gareth Fuller/PA Wire)
Idris Elba (right) and Sabrina Dhowre arrive at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Gareth Fuller/PA Wire)
Well-wishers wave British and American flags prior to the wedding ceremony of Prince Harry and Meghan Markle at St. George's Chapel. (AP Photo/Kirsty Wigglesworth)
Oprah Winfrey arrives in St George's Chapel at Windsor Castle for the wedding of Prince Harry and Meghan Markle. (Danny Lawson/PA Wire)
James Haskell and Chloe Madeley arrives at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Ian West/PA Wire)
Charles Spencer (centre) arrives at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry. (Ian West/PA Wire)
Amal Clooney, George Clooney, Oprah Winfrey, Victoria Beckham and other celebrities from around the world are arriving at Windsor Castle for the royal wedding of Prince Harry and Meghan Markle.