Richard Steven Horvitz (born July 29, 1966) is an American actor and comedian, best known for his voice work in animation and video games. His voice credits include the original Alpha 5 on Mighty Morphin Power Rangers, Power Rangers Zeo and Power Rangers Turbo, Razputin in Psychonauts, Kaos in Skylanders, Billy and his father Harold in Grim & Evil and The Grim Adventures of Billy & Mandy, Grey Matter in Ben 10, Rodney in Squirrel Boy, Daggett in The Angry Beavers, Zim in Invader Zim, Orthopox in Destroy All Humans!, the Zoni in Ratchet & Clank, Bumble in Kinectimals, the Space Weaver in Broken Age, Kanchomé in Zatch Bell!, and Moxxie in Helluva Boss.
2023Mighty Morphin Power Rangers: Once & Always as Alpha (voice)
2022Sketchy Queens (1 Episode) as Various Characters
2021Seal Team as Snap (voice)
2021Jellystone! (1 Episode) as Billy / Mogar / Rodney J. Squirrel (voice)
2020Green Seas as Writer
2020Helluva Boss (20 Episodes) as Moxxie (voice)
2019Invader Zim: Enter the Florpus as Zim (voice)
2019The Angry Birds Movie 2 as Additional Voices (voice)
2018Little Big Awesome (1, 1 Episode) as Stevey Murple (voice), Pacifier / Jerry / Bear (voice)
2017Meeting MacGuffin as Gormal MacGuffin (voice)
2016The Comeback Kids (1 Episode) as Richie
2016Skylanders Academy (38 Episodes) as Kaos (voice)
2016Bunnicula (65 Episodes) as Lugosi (voice)
2015New Looney Tunes (1 Episode) as Imp (voice)
2015Wonder Quest (10 Episodes) as Lacky (Voice)
2014Legends of Oz: Dorothy's Return as Munchkin Suitor (voice)
2014Mixels (1, 1 Episode) as Mixadel, Scrud, Splasho
2014I Know That Voice as Self
2013Saving Santa as Orange Haired Elf (voice)
2012The Bite-Sized Adventures of Sam Sandwich (10 Episodes) as Fryborg / Big Cheese / Salty Pup (voice)
2012Ben 10: Destroy All Aliens as Grey Matter
2011Crazy, Stupid, Love. as Lowe's Salesman #3
2011Fred & Vinnie as Book Store Autoraph Hound
2010Fish Hooks (1, 1, 1 Episode) as Ninja Fish (voice), Salmon 2 (voice), Portswain (voice)
2009The Informant! as Bob Zaiderman
2008Underfist: Halloween Bash as Billy / Harold / Pumpkin / Trick-or-Treater Eater (voice)
2008Snack Break as Grey Matter
2007The Grim Adventures of the Kids Next Door as Billy / Harold (voice)
2007Hard Four as Sheldon Goldstein
2007Ben 10: Secret of the Omnitrix as Grey Matter / Stinkfly Prisoner (voice)
2007Billy & Mandy: Wrath of the Spider Queen as Billy / Billy's Dad (voice)
2007CN Invaded Part 5: Billy & Mandy Moon the Moon as Billy / Billy's Dad (voice)
2007El Tigre: The Adventures of Manny Rivera (4 Episodes) as Unknown
2007Billy & Mandy's Big Boogey Adventure as Billy / Billybot / Harold / Pale Ghoulish Juror / Chippy the Squirrel (voice) (as Richard Horvitz)
2006Shorty McShorts' Shorts (1 Episode) as Dudley / Guard (voice)
2006Squirrel Boy (52 Episodes) as Unknown
2005Ben 10 (21 Episodes) as Grey Matter (voice)
2005Billy and Mandy Save Christmas as Billy (voice) (as Richard Horvitz)
2005Son of the Mask as Otis (voice)
2004Cartoon Network Christmas: Yuletide Follies as Billy (Voice)
2004Dave the Barbarian (1, 1 Episode) as Ned Frishman / Guard / Vicious Looking Warrior (voice), Ned Frischman (voice)
2003Billy & Mandy's Jacked-Up Halloween as Billy/Guy (voice)
2003That's So Raven (1 Episode) as Teddy
2002Codename: Kids Next Door (1 Episode) as Unknown
2002Snow Dogs as Scooper (voice) (uncredited)
2001Grim & Evil (62 Episodes) as Unknown
2001The Grim Adventures of Billy and Mandy (184 Episodes) as Billy (voice)
2001Osmosis Jones as Additional Character Voices (voice)
2001Cats & Dogs as Puppy in Barn (voice)
2001Invader ZIM (46 Episodes) as Zim (voice)
2001The Fairly OddParents (1 Episode) as Chuck (voice)
2000As Told by Ginger (1 Episode) as Mitchey Mekelburg (voice)
2000Static Shock (1 Episode) as Jimmy Osgood (voice)
2000The Grim Adventures of Billy & Mandy: Meet the Reaper as Billy (voice)
1999The Chimp Channel (13 Episodes) as Unknown
1999Jingle Bells as Cheddar (voice)
1998Sabrina Goes to Rome as Stonehenge (voice)
1998Mulan as Additional Voices (voice)
1997Working (2 Episodes) as Elevator Passenger
1997Cow and Chicken (1 Episode) as Unknown
1997I Am Weasel (1 Episode) as Beaver #2 / Owl #1 (voice)
1997Johnny Bravo (1 Episode) as Unknown
1997The Angry Beavers (123 Episodes) as Daggett (voice)
1997Turbo: A Power Rangers Movie as Alpha 5 (voice)
1996Sabrina, the Teenage Witch (1, 1 Episode) as Smaller Chair (voice), Duck Head (voice)
1996Power Rangers Zeo: Zeo Quest as Alpha 5 (voice)
1996Mighty Morphin Power Rangers Live: The World Tour Live-on-Stage as Alpha 5 (voice)
1996Sherman's Way: A Kid's Guide to Coping with Change as Corny
1995Mighty Morphin Power Rangers: The Movie as Alpha 5 (voice)
1995Get Street Smart: A Kid's Guide to Stranger Dangers as Capricorn (as Richard Stults)
1994Mighty Morphin Power Rangers: Alpha's Magical Christmas as Alpha 5 (voice)
1994Angry Beavers in: "Snowbound" as Daggett Beaver
1994Babylon 5 (1 Episode) as Mark
1993Power Rangers (208, 1, 1 Episode) as Alpha 5 (voice), Alpha 7 (voice), Mantamobile (voice)
1991The Legend of Prince Valiant (1 Episode) as Unknown
1989How I Got Into College as Young Energizer
1988The Munsters Today (2 Episodes) as Howie Buchanan
1987Summer School as Alan Eakian
2004EuroTrip ... ADR Voice Casting
2001The Grim Adventures of Billy and Mandy (2 Episodes) ... Writer
2001Shrek ... ADR & Dubbing