Bride-to-be Markle has new role to master: British royal protocol

THORNBURY, England - From curtsying to Queen Elizabeth to calling her "Your Majesty", US actress Meghan Markle will have to learn her royal lines when she marries Prince Harry and joins the ranks of the British monarchy.

Unwritten rules govern how the royals should behave and the public act around them. While many antiquated protocols have fallen by the wayside, there is still some etiquette Markle will be expected to follow after her wedding to the queen's grandson on May 19.

"The problem is that she's got to remember that, as a member of the royal family, she represents the family or, as it's been called, 'the brand'," said Grant Harrold, who served as a butler to Harry himself while working for his father Prince Charles, and now provides expert guidance on the subject.