Cast and Crew in Hey Arnold! - Grandpa's Sister (Season 4 - Episode 23)

Spencer Klein
Arnold (voice)Spencer Klein was 13 in Hey Arnold! - Season 4 - Grandpa's Sister (Episode 23).

Birthday: Sun, Aug 31 1986

Francesca Marie Smith
Helga Pataki (voice)Francesca Marie Smith was 14 in Hey Arnold! - Season 4 - Grandpa's Sister (Episode 23).

Birthday: Tue, Mar 26 1985

Jamil Walker Smith
Gerald Johanssen (voice)Jamil Walker Smith was 17 in Hey Arnold! - Season 4 - Grandpa's Sister (Episode 23).

Birthday: Fri, Aug 20 1982

Justin Shenkarow
Harold Berman (voice)Justin Shenkarow was 18 in Hey Arnold! - Season 4 - Grandpa's Sister (Episode 23).

Birthday: Fri, Oct 17 1980

Dan Castellaneta
Grandpa Phil (voice)Dan Castellaneta was 41 in Hey Arnold! - Season 4 - Grandpa's Sister (Episode 23).

Birthday: Tue, Oct 29 1957

Christopher Walberg
Stinky Peterson (voice)Christopher Walberg was 13 in Hey Arnold! - Season 4 - Grandpa's Sister (Episode 23).

Birthday: Wed, Apr 02 1986

Phyllis Diller
MitziPhyllis Diller was 82 in Hey Arnold! - Season 4 - Grandpa's Sister (Episode 23).

Birthday: Tue, Jul 17 1917
Mon, Aug 20 2012