Name	Known for
Lara Jill Miller Henry (voice) Henry (voice) See fewer	Gimme a Break! (1981)
Grey DeLisle Estelle Enormomonster / Nan-oh (voice) (as Grey Griffin) Estelle Enormomonster / Nan-oh (voice) (as Grey Griffin) See fewer	Batman: Arkham City (2011)
Tom Kenny Daddo / Grando (voice) Daddo / Grando (voice) See fewer	SpongeBob SquarePants (1999)
Rob Paulsen Denzel Dugglemonster (voice) Denzel Dugglemonster (voice) See fewer	Animaniacs (1993)
Hynden Walch Summer (voice) Summer (voice) See fewer	Adventure Time (2010)
Brian Blessed Eduardo Enormomonster (voice) Eduardo Enormomonster (voice) See fewer	Flash Gordon (1980)
Lori Alan Momma (voice) Momma (voice) See fewer	Inside Out (I) (2015)
Brenda Blethyn Ernestine Enormomonster (voice) Ernestine Enormomonster (voice) See fewer	Pride & Prejudice (2005)
Beth Chalmers Momma (voice: UK version) Momma (voice: UK version) See fewer	Crysis 3 (2013)
Sue Elliott-Nichols Nan-Oh (voice: UK version) Nan-Oh (voice: UK version) See fewer	Call the Midwife (2012)
Teresa Gallagher Henry (voice: UK version) Henry (voice: UK version) See fewer	The Amazing World of Gumball (2011)
Simon Mattacks Grando (voice: UK version) Grando (voice: UK version) See fewer	007: The World Is Not Enough (2000)
Naomi McDonald Summer (voice: UK version) Summer (voice: UK version) See fewer	Go Jetters (2015)
Cree Summer Actress (voice) Actress (voice) See fewer	Atlantis: The Lost Empire (2001)
Kari Wahlgren Actress (voice) Actress (voice) See fewer	Rick and Morty (2013)
Tim Whitnall Daddo (voice: UK version) Daddo (voice: UK version) See fewer	Teletubbies (1997)
Jane Whittenshaw Cobby (voice: UK version) Cobby (voice: UK version) See fewer	Golden Years (I) (2016)
Chiara Zanni Cobby (voice) Cobby (voice) See fewer	Valley of the Boom (2019)