Welcome aboard, Wendi!
Some of Disney Cruise Line's sailings have special themes, like the
Halloween on the High Seas sailings,
Very Merrytime sailings, and
Star Wars Day at Sea sailings. These take place at certain times of year and there are themes of those particular holidays. For the Star Wars Days at Sea sailings, there is an entire day for guests to wear Star Wars costumes and participate in Star Wars themed events and activities. The sail dates and ships for these special cruises are listed on their pages on Disney Cruise Line's website, so you can check to see if your cruise is one of these themed sailings.
You asked about costumes, and I wonder if maybe you had heard about Pirate Night and the pirate costumes many guests wear. On most of Disney's cruises (except Alaskan sailings), one night is
Pirate Night when everything from dinner to games and activities revolves around pirates, and the attire for the evening is pirate-themed. Guests all receive a Pirates IN the Caribbean bandana to wear, but many guests bring their own extra pirate accessories or even full out pirate costumes! The night concludes with a Pirates IN the Caribbean Deck Party and the Buccaneer Blast fireworks at sea! Even your favorite Disney friends will be out for meet and greets in their swashbuckling costumes! A great photo opportunity!
Feel free to stop back again and let us know your cruise date and which ship you're on and we can answer more specific questions that you might have to help you prep for your own exciting adventures, Wendi!
Marcy