The Fault in Our Stars is a novel by John Green. It is his fourth solo novel, and sixth novel overall. It was published on January 10, 2012. The title is inspired by Act 1, Scene 2 of Shakespeare's play Julius Caesar, in which the nobleman Cassius says to Brutus: "Men at some time were masters of their fates, / The fault, dear Brutus, is not in our stars, / But in ourselves, that we are underlings." The story is narrated by Hazel Grace Lancaster, a 16-year-old girl with thyroid cancer that has affected her lungs. Hazel is forced by her parents to attend a support group where she subsequently meets and falls in love with 17-year-old Augustus Waters, an ex-basketball player, amputee, and survivor of osteosarcoma.

The Fault in Our Stars is a 2014 American coming-of-age romance film directed by Josh Boone from a screenplay by Scott Neustadter and Michael H. Weber, based on the 2012 novel of the same name by John Green. The film stars Shailene Woodley and Ansel Elgort, with Laura Dern, Sam Trammell, Nat Wolff, and Willem Dafoe in supporting roles. The story centers on a sixteen-year-old cancer patient, played by Woodley, forced by her parents to attend a support group, where she meets and subsequently falls in love with another cancer patient, played by Elgort.