Acting siblings Willow and Jaden Smith (parents are Will Smith and Jada Pinkett Smith) are attached to star in Warners' adaptation of Kazu Kibuishi's Amulet.

According to Variety, the graphic novel centers on a brother and sister who move into their late great-grandfather's home after their father dies. They must use his amulet to rescue their widowed mother from a beast who lures her into an underground world.

Seven-year-old Willow next appears in Kit Kittredge: An American Girl, due from Picturehouse in June, and previously appeared with her father in I Am Legend.

Nine-year-old Jaden appeared with his dad in The Pursuit of Happyness and next appears in Fox's remake of The Day the Earth Stood Still.

No production date has been set.