Anna Rodenbeck, director at wedding planning company WCO Events, said for women, black tie “typically means a floor-length gown, though a very elegant cocktail dress or a dressy pantsuit can ...

Elizabeth Emanuel, the co-designer of Princess Diana's iconic wedding dress, has revealed how she created a secret second gown for the royal -- as a backup.

Princess Diana's wedding dress designer Elizabeth Emanuel exclusively tells PEOPLE about her plans to recreate the decade-defining wedding dress Diana wore to marry Prince Charles in 1981.