Hi Tiasheena,
Bon Voyage! I love the Disney Cruise!
I would pack casual clothes for the day for touring during the day. This could be shorts, capris, sweatshirts and walking shoes. It should match the activities you have planned for the day. You also want a bathing suit and cover ups for the day at Castaway Cay and the pool. Sandals or flip flops help as well.
For the evenings, resort casual is acceptable. This means dress shorts, skirts and dresses for dinner. For formal night, some guest do wear suits, sports coats and long gowns. It really is up to you. For formal night, my husband wore a button down shirt and dress pants and the girls and I wore nice summer dresses. There are photographers on board so it is a great opportunity to get a family portrait.
Some cruises have pirate night so you will want to pack pirate gear such as a patch, a hook or a bandana. It really is about having fun.
Finally, if you plan on eating at any of the adult only restaurants, you will need to be dressed nicer including a sport coat for your male date.
Wishing you a magical cruise!
Beth