When making a reservation, add the birthday to your reservation notes. Your Disney Cruise Cast Members will want to make a magical moment!

The staff & crew will likely sing to her at dinner, bring a special dessert, and maybe even give her a button. Your stateroom host will often make special towel creations and leave them on her bed. The kids clubs will then have it in their notes as well.

When you arrive on the ship, tell two people: your stateroom host and your dining room server. That’ll increase the odds of some special magic happening.

There are packages for purchase (more info here). I’ve not bought one but I’ve heard that DCL decorates your stateroom and brings gifts. They make it special.