LONDON, ENGLAND - JUNE 18: Author John Green, Nat Wolff, Cara Delevingne and director Jake Schreier attend the "Paper Towns" Photocall at Claridges Hotel on June 18, 2015 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JUNE 18: Author John Green, Nat Wolff, Cara Delevingne and director Jake Schreier attend the "Paper Towns" Photocall at Claridges Hotel on June 18, 2015 in London, England. (Photo by Karwai Tang/WireImage)