Hi there, Ada:
Mickey's Not So Scary Halloween Party is a specially ticketed event that does require a ticket separately from your
Walt Disney World annual pass. The party, which takes place on select nights at the
Magic Kingdom, runs from 7 PM until midnight, and features trick or treating, specially themed Halloween parades, fireworks, and entertainment.
There is an annual passholder discount for these tickets on select nights throughout the season. If you log into your
My Disney Experience account, and then go to
special event tickets, you'll be able to see the special pricing for annual passholders on the nights that it's available.
The party is such a good time, and I highly recommend taking advantage of the discount if you can. With special character appearances, spelltacular shows, and a monstrously fun dance party, there's something for the whole family.
Thanks for your question, Ada!
Anna