Alison Lohman wore a wig because she was bald throughout this movie, as she had just previously filmed a role as a cancer patient.
The movie Claire (Renée Zellweger) shows Astrid (Alison Lohman) is Texas Chainsaw Massacre: The Next Generation (1994), in which Renée Zellweger appeared.
In this movie, Ingrid is an artist, while in the book, she was a writer. Showing an artist working was deemed more watchable than showing a writer writing.
Oleander is a poisonous plant that can kill animals and people.
Melissa McCarthy appeared briefly as the paramedic moving Astrid on a stretcher following the shooting at the foster home.