Playboy founder Hugh M. Hefner, the pipe-smoking hedonist who revved up the sexual revolution in the 1950s and built a multimedia empire of clubs, mansions, movies and television, symbolized by bow-tied women in bunny costumes, has died at age 91. 

Hugh Hefner, the Playboy founder and the star of the reality show "The Girls Next Door," has died, Playboy said Wednesday. He was 91.