Disney cast members are putting the finishing touches on a special wish-granting event called Once Upon A Wish Party at Walt Disney World timed in celebration of World Princess Week. The event is for children with critical illnesses and their families and is part of Disney’s 40+ year relationship with Make-A-Wish.

More than 500 cast members are working on the event, from building stages and immersive sets to cooking delicious dishes and assembling royal packages. The event will host more than 300 participants and will feature royal encounters with Disney characters, tea and treats, and a royal ball. The goal of the event is to create a magical experience for wish families and help them forget about their illnesses for a little while.

The Once Upon A Wish Party is a heartwarming example of how Disney is committed to making dreams come true for children with critical illnesses. For more than four decades, Disney and Make-A-Wish have partnered together to grant more than 150,000 wishes to deliver joy when it’s needed most for children facing critical illnesses and their families.

MORE INFO: Learn more about the event at the Disney Parks Blog