Plot: Olga gets into a "Big Sis" program, but her "Lil' Sis" is Lila.
Cast
Spencer KleinArnold (voice)Spencer Klein was 14 in Hey Arnold! - Season 5 - Big Sis (Episode 6).
Birthday: Sun, Aug 31 1986
Francesca Marie SmithHelga Pataki (voice)Francesca Marie Smith was 15 in Hey Arnold! - Season 5 - Big Sis (Episode 6).
Birthday: Tue, Mar 26 1985
Jamil Walker SmithGerald Johanssen (voice)Jamil Walker Smith was 18 in Hey Arnold! - Season 5 - Big Sis (Episode 6).
Birthday: Fri, Aug 20 1982
Olivia HackRhonda Wellington Lloyd (voice)Olivia Hack was 17 in Hey Arnold! - Season 5 - Big Sis (Episode 6).
Birthday: Fri, Jun 17 1983
Anndi McAfeePhoebe Heyerdahl (voice)Anndi McAfee was 21 in Hey Arnold! - Season 5 - Big Sis (Episode 6).
Birthday: Fri, Sep 28 1979
Justin ShenkarowHarold Berman (voice)Justin Shenkarow was 20 in Hey Arnold! - Season 5 - Big Sis (Episode 6).
Birthday: Fri, Oct 17 1980
Blake McIver EwingEugene Horowitz (voice)Blake McIver Ewing was 15 in Hey Arnold! - Season 5 - Big Sis (Episode 6).
Birthday: Wed, Mar 27 1985
Dan CastellanetaGrandpa Phil (voice)Dan Castellaneta was 43 in Hey Arnold! - Season 5 - Big Sis (Episode 6).
Birthday: Tue, Oct 29 1957