If you’ve got a little royal fan (or hey, you’re a big one yourself!), the Royal Gathering on Disney Cruise Line is a must-do. It’s your chance to meet several Disney Princesses all in one go—and yes, it’s as magical as it sounds. But unlike other character meet-and-greets onboard, this one does require a reservation. Here’s everything you need to know to book it and enjoy it to the fullest.