When director David Gordon Green set out to make Nutcrackers, the family comedy starring Ben Stiller that opened the Toronto International Film Festival Thursday, he didn’t have to search to find his four key child actors. Central to the story, the kids play the unruly brothers who torment their Uncle Michael, Stiller’s real estate developer character, who is charged with figuring out their care after the death of their parents. [time-brightcove not-tgx=”true”] Instead, the film was entirely based around Green’s relationship with the four real-life siblings: Atlas, Arlo, Ulysses, and Homer Janson—ages 8 through 13 (Arlo and Atlas are twins).