Julia Roberts will produce and star in Batkid Begins, a feature film based on the Dana Nachman documentary Batkid Begins: The Wish Heard Around The World.

The documentary, which is scheduled to make its world premiere tomorrow, Saturday, January 24, 2015, at the Slamdance Film Festival in Park City, UT, follows the real-life story of BatKid Miles Scott, the 5-year-old boy suffering from leukemia who made headlines in 2013 when the Make-A-Wish Foundation granted his wish to become Batman for the day.