In the movie Boychoir, Garrett's sister, actress Mackenzie Wareing, plays the role of his half-sister Stephanie and his father, Rooter, plays the role of the priest at the funeral.
His best friend since age two is Fischer Wunsch, son of former LA Dodger pitcher Kelly Wunsch.
Broke his arm in three places days before filming began in Texas for Boychoir. He used different colored splints for wardrobe continuity and had the break cast after filming wrapped.
Received the Creative Coalition Spotlight Initiative Award at the Toronto International Film Festival, shared with Dustin Hoffman, Kathy Bates, Eddie Izzard, Josh Lucas, Debra Winger & Kevin McHale for Boychoir.