The Duke and Duchess of Sussex arrived at St. George's Chapel at Windsor Castle.
Meghan, 37, wearing a navy frock designed by Givenchy.
Other royal family members in attendance include Queen Elizabeth, Prince Philip, Prince Charles, Kate Middleton and Prince William amongst others.
Also present at the chapel are 850 guests including celebrities such as Victoria and David Beckham, George and Amal Clooney, Sir Elton John, Ed Sheeran, Robbie Williams, Ellie Goulding, James Blunt and more.
Prince Harry's first cousin Princess Eugenie will now celebrate her nuptials with Jack, 32, in a ceremony conducted by Dean of Windsor David Conner.
Italian opera singer Andrea Bocelli will perform two pieces during the service, with members of the Royal Philharmonic Orchestra also featuring.
7 News is airing every moment of Princess Eugenie's wedding live, as the only Australian broadcaster with cameras inside the Chapel. More info here!