George Carlin (May 12, 1937 - June 22, 2008) performed the voice of Fillmore in Cars and Mater and the Ghostlight. Archive records of him were used to voice Fillmore in Unidentified Flying Mater. Carlin passed away on June 22, 2008 from heart faliure. Lloyd Sherr now replaces him in Cars 2.
- George Carlin was born on May 12, 1937. Fillmore's license plate is 51237.
- The beginning of his last name spells "Car", the theme (other than agreement and friendship) of the series.
- George Carlin also narrated the American version of Thomas the Tank Engine and Friends for some episodes.