John Dugan is an American actor, known primarily for his iconic role in horror cinema. He achieved international fame for playing Grandpa Sawyer in the 1974 cult film *The Texas Chain Saw Massacre*, directed by Tobe Hooper. At the time of filming, Dugan was a young actor in his early twenties but underwent a complex and grueling makeup process to embody the centenarian character. After this experience, he stepped away from acting for many years, later returning to work predominantly in independent horror films. His subsequent works include *Texas Chainsaw 3D* (2013), where he reprised his historic role, and other productions such as *The Butcher Boys* and *Rock Paper Dead*. Thanks to his first, memorable role, Dugan is considered a cult figure in the horror genre, celebrated by fans and a frequent guest at international themed conventions.