The 3D concert movie and documentary follows the popstar as she travels across the globe on her 'California Dreams' tour, and will feature a mixture of live and behind-the-scenes footage.
Perry has revealed that Part of Me includes a "tasteful" mention of her divorce from Russell Brand.
The singer made a surprise appearance at a Los Angeles screening of the film last week.
Katy Perry: Part of Me will be released on July 5.
Watch a clip below: