Other mistake: In the book Hazel is reading near the start of the film, the word 'to' is used 4 times in a row.
The Fault in Our Stars (2014)
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Directed by: Josh Boone
Starring: Laura Dern, Shailene Woodley, Ansel Elgort, Nat Wolff
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More mistakes in The Fault in Our Stars
Hazel: But, Gus, my love, I cannot tell you how thankful I am for our little infinity. I wouldn't trade it for the world. You gave me a forever within the numbered days, and I'm grateful.
Trivia: Dr. Maria is an actual oncologist who served as the oncologist for most of the members of the support group.