(Cover) - EN Movies - Kristen Stewart won't appear in her mom's directorial debut K-11, although her older brother will.

The drama is scheduled for release in 2012, and has been hotly anticipated after it was believed Jules Mann-Stewart would be enlisting the help of her famous daughter.

However, Variety now reports that Twilight star Kristen will not be starring in the picture but older sibling Cameron will be making his feature film debut.

Few details about Cameron's character are known at the moment, although shooting has already begun. Cameras started rolling on July 18 at Californian locations including Woodland Hills and Hollywood, and shooting has reportedly moved to the now-closed correctional facility Sybil Brand Institute in Los Angeles County.

K-11 tells the story of a record producer, played by Goran Visnjic, who wakes in jail ruled by a transsexual after a three-day binge. It had previously been thought Kristen would play a transgender character in the dark movie. (C) Cover Media