Sara Vilkomerson
July 20, 2015 AT 12:00 PM EDT

In honor of the July 21 premiere of Paper Towns, we asked the book’s author, John Green, a few questions: Like, how do you correctly pronounce Cara Delevingne’s name? And how does Green really feel about the movie’s star, Nat Wolff? Watch this exclusive video below with the always fun Green as he explains a few things about Wolff and Delevingne. 

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