"I am in love with you. And I know that love is just a shout into the void, and that oblivion is inevitable, and that we're all doomed. And that one day all our labor will be returned to dust. And I know that the sun will swallow the only earth we will ever have. And I am in love with you."

"That's a thing about pain. It demands to be felt."

"Apparently the world is not a wish-granting factory."

"Carole Weyers – the voice of Anne Frank"

"Emily Bach – Monica's Mom"

"Milica Govich – Mrs. Waters, Augustus's mother"

"David Whalen – Mr. Waters, Augustus's father"

"Emily Peachey – Monica"

"Willem Dafoe – Peter Van Houten"

"Lotte Verbeek – Lidewij Vliegenthart, Van Houten's assistant"

"Sam Trammell – Michael Lancaster, Hazel's father"

"Mike Birbiglia – Patrick, the support group leader"

"I fell in love with him the way you fall asleep: Slowly, and then all at once."

"Ana Dela Cruz – Dr. Maria"

"I'm a grenade and at some point I'm going to blow up and I would like to minimize the casualties, okay?"

"Let's imagine you are racing a tortoise, the tortoise has a 10 yard lead in the start, and in the time it takes you to run 10 yards, the tortoise's moved maybe one yard. So alright, you're faster than the tortoise but you cannot never catch it, you can only decrease his lead. Now certainly you can run past the tortoise as long as you don't contemplate the mechanics of that, but the question of how turns out to be so complicated that no one really solved it until Cantor proved that some infinities are bigger than other infinities... I think that answers your question."

"One sick love story."

"The only thing worse than biting it from cancer is having a kid bite it from cancer."

"They don't have forever, they have each other."

"Funerals, I've decided, are not for the dead. They are for the living."

"Nat Wolff – Isaac, Augustus' best friend"

"Shailene Woodley – Hazel Grace Lancaster"

"Laura Dern – Frannie Lancaster, Hazel's mother"

"Ansel Elgort – Augustus "Gus" Waters"

"Shishir Kurup as Mr. Banjaree, Mo's dad"

"Lance Capaldi as Ticket Taker"

"Lauren Poole as Moxie Morris"

"Bob Jesser as Mr. Gifford"

"Leedy Corbin as Georgie Gifford"

"Judith Rane as Brenda"

"Isaac Kappy as Mel"

"Ryan Montano as Tommy Delgado"

"Scott Takeda as Stella's father"

"Ariana Smythe as Sydney"

"Nick Roux as Scott Pickett, Mo's boyfriend and rhythm guitarist for the band"

"Chris Brochu as Ray Beech"

"Tisha Campbell-Martin as Miss Jenny Reznick"

"Blake Michael as Charles "Charlie" Delgado, the drummer of the band"

"Christopher McDonald as Principal Stanley Brenigan"

"Naomi Scott as Mohini "Mo" Banjaree, the bassist of the band"

"Bridgit Mendler as Olivia White, the lead singer of the band"

"Adam Hicks as Wendell "Wen" Gifford, the pianist and also a rapper of the band"