Trivia

Ralph Macchio was 63 at the time of this film's release, 12 years older than Pat Morita was when Karate Kid (1984) was released.

Ralph Macchio pushed hard to have a line in this movie that says, "Anytime I have the chance to spread a piece of his legacy, it's never the wrong choice,'" Macchio told HuffPost in an interview. "It's always paramount that Miyagi is woven into the fabric of Daniel LaRusso. Reprising this role means paying that legacy forward," Macchio added. "It's about spreading that wisdom and knowledge in a good way, in a positive way."

As this movie is set after the events in Cobra Kai (2018), the film's original release date was pushed back by five months, to accommodate for the Cobra Kai series finale's release.

Despite being released 3 months after the series finale of Cobra Kai (2018), there is a 3 year gap between that finale and the start of this film.

On November 21, 2023, Sony released a video featuring Ralph Macchio and Jackie Chan announcing they were both returning for the new movie as well as a global casting search for the new titular "Karate Kid."