Martin Mull is an American actor, comedian, and musician, known for his work in television and film. He gained popularity in the 1970s and 1980s, appearing in shows like Mary Hartman, Mary Hartman and Roseanne. His unique blend of humor and charm has made him a recognizable figure in the entertainment industry. In addition to acting, Mull is also a talented musician, releasing several albums that showcase his comedic songs. He has made guest appearances on various television shows and has been involved in theater, further demonstrating his versatility as an entertainer.