Knut Agnred is the son of the athlete Lennart Andersson, who adopted the surname Agnred. He was learning electrical engineering after studying at Chalmers University of Technology in Gothenburg. He has also worked caring for elderly people at Kålltorps sjukhem in Gothenburg. He has been a member of the comedy group After Shave since it started in 1979. Agnred has written lyrics and music for several songs performed by Galenskaparna och After Shave.