“It’s probably the hardest part that I’ve ever done,” Wolff told TheWrap on the MTV Movies Awards’ red carpet.
In the film, based on John Green‘s popular novel of the same name, Wolff plays Issac, one of many young cancer patients that make up a support group. Following surgery, Issac struggles with blindness as he befriends Hazel, played by Shailene Woodley.
Wolff also said that, despite the film’s “dark themes” and the hardships his character faces, Issac ultimately emerges as “the funniest character” in the movie, which delicately balances the comedy with the tragedy according to the book’s author.
“You may bawl your eyes out, but you’ll also laugh,” Green said, who was also on hand at Sunday’s awards.
“Fault in Our Stars” arrives in theaters June 6.
Watch the rest of the interview above.