Nat Wolff Surprises Fans With John Green at 'Paper Towns' London Event (Exclusive Photos)

Nat Wolff and John Green team up in these exclusive photos from a Paper Towns fan event on Friday (June 19) in London, England.

The 20-year-old star of the film and 37-year-old author of the book were also joined by leading lady Cara Delevingne.

PHOTOS: Check out the latest pics of Nat Wolff

During the Q&A, Nat opened up about why he wanted the role.

“So I was on set of The Fault in Our Stars and somebody came up to me and said you should really read “Paper Towns”…I read [it] and it was my favorite by far of John‘s books,” Nat told the audience, joking, “The rest were so lame. By such a huge margin.” Watch below!

FYI: Nat is wearing a Dolce & Gabbana suit.