Thomas Tull is an American billionaire businessman, entrepreneur, and film producer. He is the former chairman and chief executive officer (CEO) of Legendary Entertainment. Tull is the founder of Tulco LLC, an investment holding company that uses artificial intelligence and other technologies to guide investing.

Legendary Entertainment, LLC is an American mass media and film production company based in Burbank, California, founded by Thomas Tull along with Jon Jashni, Larry Clark, William Fay and Scott Mednick. The company has often collaborated with the major studios, including Warner Bros. Pictures, Universal Pictures, Sony Pictures and Paramount Pictures, as well as streaming services such as Netflix and Hulu. Since 2016, Legendary has been a subsidiary of the Chinese conglomerate Wanda Group and American equity firm Apollo.