 Martin Mull is dead at the age of 80. More from Jim Forbes. The comedic actor was best known for his roles in Clue, Roseanne, and Arrested Development. On Friday, his daughter shared the news on social media, revealing Mull died this week at his home, quote, after a valiant fight against a long illness. She says Mull, quote, excelled at every creative discipline imaginable, and he'll be missed by many. With a career spanning six decades, I'm Lisa Carton.