- Directors: Adam Elliot
- Producers: Melanie Coombs
- Writers: Adam Elliot
- Genres: Animation, Comedy, Drama
- Actors: Toni Collette, Philip Seymour Hoffman, Eric Bana
The film takes place from 1976 to 1994 and tells the story of the unlikely pen-pal friendship that lasts for 18 years between Mary, a chubby lonely 8-year-old girl who lives in Mount Waverley, a suburb of Melbourne, Australia, and Max, a 44-year-old, severely obese, atheistic, Jewish man with Asperger syndrome who lives in New York City.
The central focus of the movie is the letters shared between Mary and Max (from the ages of 8 to 26 and 44 to 62, respectively) and the stories behind their life and the lives of people around them.
The film states in the opening credits that it is based on a true story.