Stacy Linn Ramsower, a natural blonde, had to dye and perm her hair for the role of redheaded, frizzy-haired Mallory Pike.
Larisa Oleynik (Dawn) and Natanya Ross (Grace) worked together on the Nickelodeon show Les incroyables pouvoirs d'Alex (1994). Larisa Oleynik played the lead role, Alex Mack and Natanya Ross played Alex's friend, Robyn Russo.
Actor Christian Oliver, who played 17 year old Luca, was actually 23 at the time of the film's release in 1995.
Larisa Oleynik (Dawn) and Scarlett Pomers (Suzi Barrett) also did an episode together of The Secret World of Alex Mack. In an ironic twist, Larisa's character Alex is Scarlett's character Jackie's babysitter in the season 2 episode, "The Suspect."
The film includes commingled parts of Baby-sitters Club books #45 Kristy and the Baby Parade, #86 Mary Anne and Camp BSC, and Kristy's Book, none of which were actually written by Ann M. Martin.