Katy Perry has unveiled the poster for her upcoming 'Part Of Me' 3D film.

The singing star is set to release the film on July 5 and last night (May 17) she took to Twitter to reveal the flick's poster.

She tweeted that the advert reflects her "hairbrush to headliner" journey through the music business.

Speaking about the poster, Perry said:

"So happy to share with you the official #KP3D movie poster...from a hairbrush to a headliner...get ready, JULY 5TH!"

As previously reported, Perry is set to perform a song specially written for film on Sunday (May 20) when she will play the track 'Wide Awake' at the Billboard Music Awards.