Dan Castellaneta. Dan Castellaneta was 44 in The Simpsons: Treehouse of Horror 
Nancy Cartwright. Nancy Cartwright was 45 in The Simpsons: Treehouse of Horror 
Yeardley Smith. Yeardley Smith was 38 in The Simpsons: Treehouse of Horror 
Doris Grau. Doris Grau would have been no older than 71 in The Simpsons: Treehouse of Horror 
Phil Hartman. Phil Hartman would have been no older than 49 in The Simpsons: Treehouse of Horror 
Russi Taylor. Russi Taylor was 58 in The Simpsons: Treehouse of Horror 
Tress MacNeille. Tress MacNeille was 51 in The Simpsons: Treehouse of Horror 
Marcia Wallace. Marcia Wallace was 59 in The Simpsons: Treehouse of Horror 
James Earl Jones. James Earl Jones was 71 in The Simpsons: Treehouse of Horror 
Marsha Waterbury. Marsha Waterbury was >> in The Simpsons: Treehouse of Horror 
Maggie Roswell. Maggie Roswell was 49 in The Simpsons: Treehouse of Horror 
Matt Groening. Matt Groening was 48 in The Simpsons: Treehouse of Horror as 'Creator'
Hank Azaria
Harry Shearer
Pamela Hayden
Julie Kavner
Trish Doolan