John Knoll (born 1962) is a visual effects supervisor at Industrial Light & Magic (ILM). One of the original creators of Adobe Photoshop (along with his brother, Thomas Knoll), he is recently best known for his work as Visual Effects Supervisor on the Star Wars prequels and the 1997 special editions of the original trilogy. He also served as ILM's visual effects supervisor for Star Trek Generations and Star Trek: First Contact, as well as the first three films in the Pirates of the Caribbean series. His work on Dead Man's Chest earned him the Academy Award for Best Visual Effects.
Knoll was also the Computer Graphics Project Designer on The Abyss, an achievement which earned ILM its tenth Academy Award for Visual Effects.
Knoll also worked on two Star Trek episodes - Star Trek: The Next Generation's pilot episode ("Encounter at Farpoint") and the Star Trek: Deep Space Nine episode "Explorers".