A Fairly Odd Movie: Grow Up, Timmy Turner! (or simply known as A Fairly Odd Movie) is a 2011 live-action/animated comedy television film based on the animated series The Fairly OddParents. It first aired on Nickelodeon in the United States on July 9, 2011, to celebrate the series's tenth anniversary. Unlike the previous animated films of the series, this film is live-action with CGI animation. The television film was viewed by 5.8 million viewers during its original airing.

Serving as an epilogue to the series, the film centers on the originally 10-year-old protagonist Timmy Turner, who is now age 23 but continues living like a child to keep his fairy godparents, who are required per the fairy rulebook to leave when a godchild starts behaving like an adult. A dilemma arises when Timmy falls in love with Tootie: an awkward girl who has since grown into an attractive woman. Timmy falls in love with her, a sign that he is becoming an adult, bringing him closer to losing his fairies. Meanwhile, oil tycoon Hugh J. Magnate, Jr., teams up with Timmy's fairy-obsessed teacher Denzel Crocker and plans to use Timmy's fairies' magic to promote his oil business.

The film was released on Region 1 DVD by Nickelodeon Studios on July 11, 2011. The television film was released on Blu-ray on December 4, 2015.

On March 14, 2012, Nickelodeon announced a sequel to the film, A Fairly Odd Christmas, which premiered during 2012's holiday season, while a third film, A Fairly Odd Summer, premiered on August 2, 2014. Drake Bell, Daniella Monet, and other cast members reprised their roles in both.