Phil Hartman appeared in more than 50 episodes of "The Simpsons," beginning in Season 2 with what was supposed to be a one-time appearance as Lionel Hutz. However, Hartman enjoyed the experience, the show's producers loved his work, and fans ate up the clueless attorney. Soon he was taking on other classic supporting roles, including washed-up actor Troy McClure and con man Lyle Lanley, who convinced Springfield to build a monorail in one of the show's most beloved episodes.
The Best 'Simpsons' Guest Stars
From regulars like Kelsey Grammer to one-offs like Winona Ryder, stars love Springfield.