Zenon: Girl of the 21st Century is a 1999 Disney Channel Original Movie directed by Kenneth Johnson and starring Kirsten Storms as the eponymous heroine. The film was based on the book Zenon: Girl of the 21st Century written by Marilyn Sadler and Roger Bollen. The film was originally conceived as a pilot for a potential television series. The film was the first under the Disney Channel Original Movie banner to produce a sequel, Zenon: The Zequel (2001). A third and final installment was also produced, Zenon: Z3 (2004).

Zenon: The Zequel is a 2001 Disney Channel Original Movie directed by Manny Coto in his last directorial film before his death in 2023. It is the second installment of the Disney Channel's Zenon television film series, following the first installment, Zenon: Girl of the 21st Century (1999), and preceding Zenon: Z3 (2004). The film is also the first sequel to be produced under the Disney Channel Original Movie banner. The Disney Channel Original Series Lizzie McGuire premiered after the film's premiere. This is the only Zenon film where Raven-Symoné doesn't play Nebula. She is replaced by Shadia Simmons.