What's the difference between a tiara and a crown?

Fancy headgear of any kind is often a dead giveaway that the wearer is of some importance, be it the bride-to-be at a bachelorette party or the Queen of England herself. Queen Elizabeth II’s daughter, Princess Anne, for example, wore her mother’s Cartier Halo  tiara during a trip to New Zealand in 1970, a few years before she was married. Kate Middleton and Meghan Markle, who didn’t hail from royalty, bothwore tiaras for the first time on their wedding days. However, since there isn’t a headdress enforcement squad in Britain or anywhere else (at least not one that we know of), there’s no reason you can’t sport a crown during your next Zoom happy hour, royal or not.