The 25-year-old media personality will play the role of a groupie in `Should Have Been Romeo`, and she admits she is ecstatic to land a movie job.
She wrote on her twitter page: "i got my firstmovie roll we have been in rehearsals for a week and i start filming on wednesday i could not be happier!
"the movie is called `Should have been Romeo` its a comedy and i play the role of nicole who is a crazy groupie! its amazingly funny(sic)"
Kelly previously had a cameo in `Austin Powers: Goldmember` in 2002, and in 2008 starred alongside Sophie Ellis Bextor and London socialite Jodie Harsh in short film `The Town That Boars Me`.
She also appeared on UK TV series `Hotel Babylon` for one episode in 2009, although is still best known for her docu-comedy `The Osbournes`, which followed her life with parents Sharon and Ozzy in their Los Angeles home.