Decide on a date and whether you want to go for breakfast, lunch or dinner. Keep in mind that breakfast is usually the most popular meal. The key to getting a reservation on your chosen date is to reserve it early. Reservations can be made up to 180 days in advance, so, as soon as you know you'll be visiting Walt Disney World, plan your reservation for dining at Cinderella's Castle.
Make the reservation in one of two ways: phone it in or reserve it online. Cinderella's Royal Table reservations can be made either by calling Disney World's Guest Services at 407-939-3463, or by reserving a date and time at the restaurant online, using the Disney website (see website address in References section below.)
Call the park every day starting about a week before your desired date to check for a cancellation if you haven't yet been able to secure a reservation. If you get to the park and still don't have a reservation, stop at Guest Services and ask them to call the castle to see if there are any last-minute seatings available.