How does 'Wonka' connect to Gene Wilder's 'Willy Wonka and the Chocolate Factory'?

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Gene Wilder, the original 'Wonka,' is subject of two new documentaries

How does 'Wonka' connect to Gene Wilder's 'Willy Wonka and the Chocolate Factory'?

All of the Actors Who Have Played Willy Wonka – The Hollywood Reporter

Gene Wilder Dies at 83; Star of 'Willy Wonka' and 'Young Frankenstein' - The New York Times

The Fey Candy Man: Gene Wilder's Willy Wonka Is Unlike Any Other - Reactor

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Willy Wonka Was Never Meant to Be the Star of His Own Movie - The Ringer

Gene Wilder Had One Stipulation to Play Willy Wonka – The Hollywood Reporter

Jonathan Slinger interview as Willy Wonka in Charlie and the Chocolate Factory, Theatre, Entertainment

Roald Dahl's Reaction to 'Willy Wonka and the Chocolate Factory