The couple will be accompanied by children no older than 7 when they officially tie the knot, including six bridesmaids and four page boys. Harry's nephew and niece, Prince George, 4, and Princess Charlotte, 2 -- the children of Prince William and Kate Middleton -- were among those selected.
The bridal party also includes two of Harry's goddaughters, Florence van Cutsem, 3, and Zalie Warren, 2, along with two of Markle's goddaughters, Rylan Litt, 7, and Remi Litt, 6.
Harry's godson Jasper Dyer, 6, and the three children of Markle's friend, Canadian stylist Jessica Mulroney -- Ivy, 4, and twins Brian and John, 7 -- round out the rest of the bridal party.
Harry and Markle will marry Saturday at St. George's Chapel at Windsor Castle in England. The ceremony begins at noon GMT, 7 a.m. EST.