Robyn Lively reappears as Jessica Andrews, a cousin to Amanda Russo, and it is mentioned that Jessica introduced Amanda to Daniel.
Jessica Andrews and Amanda LaRusso come face to face with a girl in a bar called Elizabeth Ann Rooney. This is the same girl that stole Jessica's boyfriend from her in The Karate Kid Part III (1989).
Amanda's nickname in high school was Babe Ruthless.
Amanda's maiden name is Steiner.
Courtney Henggeler (Amanda) and Sunny Mabrey (Lizzie-Anne) appeared together in the TV movie Escaping Dad (2017), where they play best friends instead of enemies.