Kanye West and Kim Kardashian behind the scene

The Bound 2 hitmaker - who has eight-month-old daughter North with the Keeping Up with the Kardashians star - is teaming up with author Bret Easton Ellis for a film based on his Yeezus album and insiders say his fiancée will "definitely" be part of the cast.

A source said: "It's going to be based on theYeezus album. That's pretty much a narrative of Kanye's life.

"Kanye will not appear in the movie. Kim is definitely going to be in it. The screenplay already features her character."

However, it has not yet been decided how big a role Kim will play in the movie.

The source continued to RadarOnline.com: "They're still working on the script, so it's unclear at this point if Kim will be a major star of the movie or making a smaller cameo but her role in the movie will be pivotal.

"Her role is going to be very dramatic. Far from the bubbly happy persona that she's always played."

Kanye plans to direct the movie - which will be dedicated to his late mother - and ''wants to be heavily involved in all aspects of production