Roy Trenneman is a fictional character from the British television series The IT Crowd. He is portrayed by actor Chris O'Dowd and is known for his laid-back attitude and humorous personality. Roy works in the IT department of the fictional company Reynholm Industries and often interacts with his colleagues, including Maurice Moss and Jen Barber. In the show, Roy is characterized by his sarcastic wit and frequent disdain for the non-technical staff. His role often involves dealing with clueless users who seek help with their computer problems, leading to comedic situations. The series highlights the dynamics of office life and the challenges faced by IT professionals.