AceShowbiz -

Amid her headline-grabbing cheating scandal, Kristen Stewart reportedly decided to let go one of her upcoming movie projects. It was Gossip Cop which shared the words that the "Twilight Saga" actress has bowed out of "Cali", in which she's supposed to take on an "edgy and sexy" female lead role.

It's still unclear as to why Stewart chose to exit the Nick Cassavetes-directed film project. Her camp hasn't made any comment to confirm the report. On the other hand, Voltage Production, the company that develops the project, promised that it would make an announcement soon.

Though she's no longer locked to star in the film, insiders revealed that the "On the Road" actress would still serve as the producer. Furthermore, the sources said that Amber Heard has been approached to join the cast, but it's not confirmed whether or not she would be tackling the part Stewart has left.

Stewart was originally expected to play female lead Mya. She's involved in a dangerous business with her boyfriend Chris. After selling a fake snuff film featuring Mya, the San Fernando Valley lovebirds run away with a bundle of cash.

Years later, Mya must "return from the dead" to save the sister she left behind in Cali, where she and her boyfriend must contend with angry former business partners, homicidal porn stars, stoner vet techs, an unstoppable killing machine in a cowboy hat and their own contentious relationship.

Set in Los Angeles, "Cali" has tapped Alex Pettyfer to play leading man Chris. The script, meanwhile, will be penned by Michael Diliberti. The indie movie is expected to begin filming in late summer.

Before deciding to leave "Cali", Kristen Stewart recently landed a role in "Lie Down in Darkness", an adaptation of William Styron's 1951 novel about a dysfunctional Virginian Loftis family. She took over the role from Jennifer Lawrence, who exited the project due to her commitments to "The Hunger Games" film series and "X-Men: Days of Future Past".