The story of Miles Scott, a five-year-old battling leukemia who took over part of San Francisco as "Batkid" in 2013, is set to become a feature film thanks to a documentary about him and his family that's premiering tomorrow. Variety reports that Julia Roberts is set to produce and star in an adaptation of Batkid Begins: The Wish Heard around the World, the film about Scott, who became Batkid in November 2013 thanks to the Make-A-Wish Foundation. That film originated from an Indiegogo campaign from filmmaker Dana Nachman, and successfully raised more than $100,000. It's premiering at the Slamdance Film Festival in Utah tomorrow.

Scott (who is in remission) spent that particular day battling fictional Batman villains like the Riddler and Penguin in a city-wide event that involved the collaboration of local police and government officials. The plan originally involved just a few hundred volunteers, though thousands showed up to participate. People outside of the city, including President Barack Obama also got involved. Nachman's film promises to chronicle not only the day San Francisco became Gotham City, but also Scott's family and personal story.

No word yet on when this is planned for, or what Roberts' role will be. Here's the trailer from Nachman's film: