Name	Known for
Dean Wendt Barney (voice) Barney (voice) See fewer	Barney: Let's Go to the Farm (2005)
Carey Stinson Barney Barney See fewer	Barney: I Love My Friends (2012)
Selena Gomez Gianna Gianna See fewer	Spring Breakers (2012)
Kayla S. Levels Whitney (as Kayla Levels) Whitney (as Kayla Levels) See fewer	Barney: Read with Me, Dance with Me (2003)
Zachary Soza Mario Mario See fewer	Barney: Read with Me, Dance with Me (2003)
Grayson Vanover Nick Nick See fewer	Barney: Read with Me, Dance with Me (2003)
Mary Lyons Gianna's Mother Gianna's Mother See fewer	Serving Sara (2002)
Robert Meadows Gianna's Father Gianna's Father See fewer	Degenerates (2013)
Kate Aberger Gianna's Sister Gianna's Sister See fewer	LAX (2004)
John la Costa Gianna's Brother (as John Peter Lacosta) Gianna's Brother (as John Peter Lacosta) See fewer	Rush (II) (2020)
Alicia Caesar Whitney's Grandmother Whitney's Grandmother See fewer	Barney & Friends (1992)
Kelly Bender Whitney's Grandfather (as Kelly F. Bender) Whitney's Grandfather (as Kelly F. Bender) See fewer	Mister Gates (2024)
Melinda Lea'l Mario's Mother Mario's Mother See fewer	Barney & Friends (1992)
Rene Munguia Mario's Father (as Rene' Mungia) Mario's Father (as Rene' Mungia) See fewer	AlamoHeightsSA.com (2006)
Orlando Rojas Mario's Brother Mario's Brother See fewer	F.E.A.R. First Encounter Assault Recon (2005)
Rick Walker Nick's Dad Nick's Dad See fewer	Veritas, Prince of Truth (2006)
Mike Baxter the Dog Baxter the Dog See fewer	Barney & Friends (1992)
Jason Hopley Barney (voice) Barney (voice) See fewer	Nanalan' (1999)
Lea Velez Mario's Sister Mario's Sister See fewer	Barney & Friends (1992)