Mickey's Not-So-Scary Halloween Party returns to Magic Kingdom on select nights from August 7 through October 31, 2026, and it comes with one of the few occasions where adults are actually allowed to dress as Disney characters inside the park. Party tickets grant entry starting at 4 p.m., with the event itself running from 7 p.m. to midnight. A new Tomorrowland experience featuring Stitch, Lilo, and Angel is among the additions this year.

The biggest rule adults tend to get wrong involves masks. Guests ages 14 and older may not wear costume masks of any kind, even during the party — costume headwear is fine as long as it doesn't cover the face. Children 13 and under can wear masks, provided their eyes remain fully visible and they have unobstructed peripheral vision. That difference catches families off guard when a matching superhero costume works for a younger child but not for an older sibling or parent wearing the same look.

Garment length is another detail worth double-checking before leaving home. Costumes cannot reach or drag along the ground, and Disney specifically calls out full-length princess gowns as an example. Capes must end at or above the waist. Accessories like toy swords and plastic lightsabers are generally fine, but anything that could reasonably be mistaken for an actual weapon — or that has sharp or pointed edges — won't make it through the entrance.

Beyond those specifics, all costumes must be family-friendly and cannot be obstructive, offensive, objectionable, or violent. Disney also has a clear rule against guests in character costumes posing for photos with other visitors or signing autographs, to prevent any confusion with actual Disney entertainment performers. Full-body or heavily layered costumes aren't banned outright, but Disney warns they may require extra security screening.

With some 2026 party dates already sold out, a costume that doesn't meet the guidelines at the gate would be a rough start to a pricey evening — a quick check before heading out can prevent the headache. This reporting draws on coverage from Disney Fanatic.