Disney+ has revealed the trailer for Disney Worldbuilders, a new feature-length documentary from Academy Award- and Emmy-nominated filmmaker Leslie Iwerks. In Disney Worldbuilders, some of Disney’s most influential storytellers reflect on the memories, moments, and creative breakthroughs that shaped their work, tracing how those stories come to life at Disney’s theme parks around the globe. Disney Worldbuilders captures the architects of these franchises in their own words, on what they’ve built together and where they’re taking it next. Ahead of its debut on Disney+, Disney Worldbuilders will have its world premiere at D23 —the ultimate Disney fan event — on Sunday, August 16, where attendees will be among the first to see the film in its entirety. Leslie’s grandfather, Ub Iwerks, was Walt Disney’s original animator and co-creator of Mickey Mouse; her father, Don Iwerks, was a camera technician and inventor at Walt Disney Studios.