Check Out All of the Royals' Stunning Signatures, from Queen Elizabeth's to Kate Middleton's

For most people—especially in the digital age—a signature is a utilitarian tool, used after swiping a card at checkout or agreeing to a contract. But for the royal family, autographs are a big part of the job, whether they're leaving their mark in a decades-old guestbook or adding a personal touch to an important thank you note.

So what kinds of signatures have they composed, and kept consistent for years or decades? Here, the Windsors' autographs, from Queen Elizabeth's classic mark to Kate Middleton's curvy cursive.