WINDSOR, England—A grandson of Queen Elizabeth II will on Saturday take as his bride an American actress, in a wedding that is melding Hollywood glitz and glamour with centuries-old royal traditions.
Millions of people around the world are set to watch on television as Meghan Markle, the star of the legal drama “Suits,” walks down the aisle of 15th-century St. George’s Chapel, just inside the walls of Windsor Castle. After Prince Harry, 33, and Ms. Markle, 36, tie the knot, the newlyweds will greet crowds from an open-topped...