AJ Gentile is an American producer, writer, actor, and YouTube personality best known as the creator, host, and writer of "The Why Files," a channel that delves into conspiracy theories, mysteries, and unexplained phenomena with engaging storytelling and a skeptical lens.

Before gaining fame on YouTube, Gentile worked in Hollywood as a producer and writer, contributing to projects like The Naughty Show (2011) and Stoned Science (2018), and provided voice-over work, including roles in The Legend of Korra. In 2011, he co-founded SpeedWeed, a cannabis delivery company, with his brother Gino and wife Jen.