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The 70th anniversary celebrations continue for Disneyland

PEOPLE is sharing an exclusive first look at ABC News’ The Happiest Story on Earth: 70 Years of Disneyland — A Special Edition of 20/20

Special guests include Meghan Markle, Prince Harry, Jamie Lee Curtis, Neil Patrick Harris and more

Disneyland’s 70th anniversary celebration continues, and some of the park’s biggest fans are here to help tell the story.

On Sunday, Sept. 21, ABC News will premiere The Happiest Story on Earth: 70 Years of Disneyland — A Special Edition of 20/20 . This in-depth feature will give an inside look at the history of the park and what has yet to come.

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“Viewers will hear reflections on childhood visits to the

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