Trivia: Director John Hamburg was James Franco's professor when Franco was attending the graduate film-making program at New York University.
Trivia: To make the office appear larger than it was, the team used forced perspective - adult actors at the front, with child actors behind them, and tiny desks with wire-operated dolls at the back.
Trivia: It was so cold during filming in New York in winter that the cameras froze several times.
Trivia: The lead guitarist in the Jack Frost Band is the film's music composer, Trevor Rabin.
Trivia: Siblings Anonymous features three real brothers of celebrities: Frank Stallone, Roger Clinton, and Stephen Baldwin.
Trivia: Janet Leigh (born 1927), who plays Timmy Ennis' mother, Connie, was only fourteen years older than Gordon Gebert (born 1941).
Trivia: This was originally conceived as The Santa Clause 4, then repurposed into an original film.
Trivia: When Mauricio and Sarah receive the dress for baptizing a future daughter, they ponder over raising future children as Jewish or Catholics. Mauricio then says, "Who ever heard of Jewish Puerto Ricans?" John Leguizamo, who plays Mauricio, has children who are half Jewish.
Trivia: Scream Queen Linnea Quigley appears in the movie as a babysitter.
Suggested correction: How is someone being in the cast a piece of trivia? Unless it's something notable like one of an actor's earliest roles, or a final appearance, it's not really interesting enough to be considered trivia.
Trivia: The way Donna attempts to get the bus stopped is a direct nod to the 1994 movie Speed. The bus driver is even named Sam, the same as the driver in that film.
Trivia: Minnie Mouse doesn't have a single line of dialogue in the film.