Directed by: George Roy Hill
Starring: Robin Williams, Glenn Close, John Lithgow, Jessica Tandy, Mary Beth Hurt
Trivia: Even though Mary Beth Hurt and Glenn Close played women from different generations, in reality they are only a year apart in age.
Trivia: The man who plays the part of the wrestling referee is John Irving. He wrote the book on which the movie is based.
Trivia: This was Glen Close's first movie (not counting TV work).
Trivia: Glenn Close plays Robin Williams' mother in the movie, even though in real life she's only four years older than him.
Continuity mistake: As Garp is being placed aboard the helicopter, the rotor motor can be heard spinning, but there is no downdraft affecting the people in the scene.
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Answer: The book makes it pretty obvious that there are a number of factors: 1) She caught Garp and her sister in the middle of things. 2) Garp hurt her dog. 3) She actually hated him from the start and it just got worse.