Green Book, based on the true story of a tour of the Deep South by African American classical and jazz pianist Don Shirley and Italian American bouncer Frank "Tony Lip" Vallelonga, was co-written by Tony Lip's son, Nick Vallelonga. However, it was definitely a family matter for him in more than one way. He actually hired real-life family members to play the on-screen family members of Tony, who in the film is played by Viggo Mortensen. Vallelonga, however, made Mortensen believe director Peter Farrelly had cast them while turning around and suggesting to Farrelly that Viggo had vouched for them as actors. The two only figured out the truth a month into the press tour. In addition, Vallelonga says he spent a lot of the shoot in tears because the actors' portrayals of his parents were so vivid. In refernece to actress Linda Cardellini, who played his mother Dolores, he was quoted saying, "Linda Cardellini, I can't even look at all. She just makes me lose it." He definitely kept this story in the family. Stay tuned!