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Walt Disney World’s Magic Kingdom will be open for 24 hours from 6 a.m. May 22 to 6 a.m. May 23.

Olaf the snowman will be the official host of the 24-hour event that kicks off Memorial Day weekend.

It’s part of Disney’s “Coolest Summer Ever” promotion. Summer events include the characters of “Frozen” live at Disney’s Hollywood Studios June 17-Sept. 7. The promotion also includes a deal in which visitors can purchase a one-day water park ticket and park-hop between Blizzard Beach and Typhoon Lagoon

This is the resort’s fourth 24-hour event.