This film is loosely based on the 2008 memoir of the same name by Benjamin Mee.
In the film, Rosie refers to her dad, Benjamin Mee, as "more handsome" than the other dads because most of them don't have hair. The real Benjamin Mee is completely bald.
In the scene where Matt Damon's character climbs over the tree, the real Benjamin Mee, Milo Mee (Dylan in the movie) and Ella Mee (Rosie in the movie) can be seen as the first family in line. In the scene, Benjamin Mee is wearing what appears to be a Dartmoor Zoological Park cap, which is the actual zoo in England on which the movie is based.
In the scene where Benjamin Mee first meets the staff, Kelly mentions that there is a weak enclosure between the jaguar and the tigers. In the real Dartmoor zoo the jaguar escaped into the tiger enclosure.
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