Follow historian Lucy Worsley into the archives to see dresses chosen by previous royal brides. Experts and commentators join Meredith Vieira and Matt Baker to determine why royal style is dictated as much by protocol and etiquette as by fashion.

Learn how the royal family celebrates a royal marriage. Experts and commentators join Vieira and Baker to talk about everything from the carriage procession to the cake. Anita Rani reports from Windsor Castle, where preparations are in full swing.