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 The Secret World of Alex Mack (1994). Larisa Oleynik played the lead role, Alex Mack and Natanya Ross played Alex's friend, Robyn Russo.
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.
Actor Christian Oliver, who played 17 year old Luca, was actually 23 at the time of the film's release in 1995.
Luca, who is from Switzerland, says "tschüss" to Stacey's mom when leaving the house. Tschüss, or tschüß, is German for "goodbye." German is spoken by about 64% of Switzerland. The other three national languages are French (20%), Italian (7%), and Romansh (less than 1%).