Katy Perry: Part Of Me will be out in US cinemas July 4, in time for Independence Day.
The 'One That Got Away' singer confirmed the plans while talking to E!'s Kelly Osbourne on the red carpet for last night's Nickelodeon Kids' Choice Awards in Los Angeles.
"Go and see it and be a firework," she told Osbourne.
Magical Elves - the production company behind Justin Bieber's Never Say Never movie - are reportedly in talks to produce the project.
Katy Perry - who performed 'Part of Me' during last night's awards ceremony - recently asked her fans to get involved with the 3D movie.
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Watch the video for Katy Perry's 'Part of Me' below: