Kenneth Victor Campbell was an English writer, actor, director and comedian known for his work in experimental theatre. He has been called "a one-man dynamo of British theatre."Campbell achieved notoriety in the 1970s for his nine-hour adaptation of the science-fiction trilogy Illuminatus! and his 22-hour staging of Neil Oram's play cycle The Warp. The Guinness Book of Records listed the latter as the longest play in the world.