A Royal Family themed birthday party can be regal, classy, and a lot of fun. It's an opportunity to treat yourself and your guests to the finer things in life, and if the celebration is a "milestone" birthday—a 21st or a 50th, for example—you can really push the boat out and treat the event as a coronation.
It only seems right that invitations to a Royal birthday party should be sent out via the Royal Mail. Nowadays, it seems that only wedding invitations are posted. Design your own invitations by visiting the craft section of a stationery shop and gathering materials for an extra-special touch. If you make the effort to send out your invites by post, your guests are more likely to make an effort with their costumes and overall approach to the celebration.
The forfeit for any guest who turns up in normal party clothes could be to address you as "Your Majesty" if you're female or "Your Royal Highness" if you're male for the entire evening. If you didn't do so in the invitations, remind your guests at the door to greet you as royalty—an initial curtsy for women, and a lowering of the head for men. Once is enough, though!
It's your birthday, so it's only fair that you get to be the king or queen. You can assign made-up titles to your guests (and pets) if you're feeling particularly creative. Close friends and young children can be princes and princesses, and everybody else can be lords and ladies, or dukes and duchesses. Period clothing will be expensive, but will also seem a lot more glamorous than what the Royal Family wear today. Regardless of what you choose, let your guests know that dressing (and acting) like royalty is compulsory!
Preparing the palace
White tablecloths, flower arrangements, and folded napkins will help create the sophisticated atmosphere you need for a Royal Family themed birthday party. If you want to add a touch of humour to the celebrations, buy some inflatable corgis online.
Food and drink
Champagne is expensive, but sparkling wine will do just as well if you can't afford to spend a lot of money on drink. Stereotypically British treats like tea and scones are a good idea if you're planning on starting the party during the day, but if you're planning an evening celebration, pastry canapés and cake are a safer bet.