Nic Sheff is an American author and screenwriter, best known for his memoirs that detail his struggles with addiction and recovery. His most notable work, “Tweak: Growing Up on Methamphetamines,” provides an honest account of his experiences with substance abuse and the challenges he faced in overcoming it. In addition to his writing, Nic Sheff has contributed to the film adaptation of his memoir, which was released as “Beautiful Boy.” The film stars Timothée Chalamet as Nic and Steve Carell as his father, David Sheff, highlighting the impact of addiction on families.