Don Messick is one of the most beloved voice actors of all time. He had a long career of voicing iconic characters from Hanna-Barbera cartoons. His most iconic role is voicing Scooby-Doo. He was Scooby's voice actor for several years. After Don Messick retired, several actors voiced Scooby. Eventually, the role went to Frank Welker, the original voice of Fred Jones.
Don Messick's iconic Hanna-Barbera roles:
Scooby-Doo in Scooby-Doo, Where Are You?
Boo-Boo and Ranger Smith in Yogi Bear
Pixie in Pixie and Dixie and Mr. Jinks
Bamm-Bamm Rubble and Hoppy in The Flintstones
Astro in The Jetsons
Muttley in Wacky Races
Mr. Peebles in Magilla Gorilla
Dr. Quest in Johnny Quest
Atom Ant in Atom Ant
Ricochet Rabbit in Ricochet Rabbit & Droop-a-Long
Blip and Zorak in Weltraum Ghost
Spot in Hong Kong Phooey
Scarecrow in Super Friends
Papa Smurf and Azrael in The Smurfs
Don Messick's iconic Hanna-Barbera roles:
Scooby-Doo in Scooby-Doo, Where Are You?
Boo-Boo and Ranger Smith in Yogi Bear
Pixie in Pixie and Dixie and Mr. Jinks
Bamm-Bamm Rubble and Hoppy in The Flintstones
Astro in The Jetsons
Muttley in Wacky Races
Mr. Peebles in Magilla Gorilla
Dr. Quest in Johnny Quest
Atom Ant in Atom Ant
Ricochet Rabbit in Ricochet Rabbit & Droop-a-Long
Blip and Zorak in Weltraum Ghost
Spot in Hong Kong Phooey
Scarecrow in Super Friends
Papa Smurf and Azrael in The Smurfs
Raja Gosnell directed the two live-action Smurfs films, but before that, he directed 2002's Scooby-Doo and 2004's Scooby-Doo 2: Monsters Unleashed.
The Mystery Gang:
Matthew Lillard as Norville Rogers (Shaggy)
Freddie Prinze Jr. as Fred Jones
Sarah Michelle Gellar as Daphne Blake
Linda Cardellini as Velma Dinkley
Neil Fanning as the voice of Scooby-Doo
From the 2002 film:
Rowan Atkinson as Emile Mondavarious
Isla Fisher as Mary Jane
Scott Innes as the voice of Scrappy-Doo
Frank Welker, the original voice actor of Fred Jones, voiced one of the creatures in the film
From Monsters Unleashed:
Seth Green as Patrick Wisley
Peter Boyle as Jeremiah Wickles
Alicia Silverstone as Heather Jasper Howe
Tim Blake Nelson as Dr. Jonathan Jacobo
The Mystery Gang:
Matthew Lillard as Norville Rogers (Shaggy)
Freddie Prinze Jr. as Fred Jones
Sarah Michelle Gellar as Daphne Blake
Linda Cardellini as Velma Dinkley
Neil Fanning as the voice of Scooby-Doo
From the 2002 film:
Rowan Atkinson as Emile Mondavarious
Isla Fisher as Mary Jane
Scott Innes as the voice of Scrappy-Doo
Frank Welker, the original voice actor of Fred Jones, voiced one of the creatures in the film
From Monsters Unleashed:
Seth Green as Patrick Wisley
Peter Boyle as Jeremiah Wickles
Alicia Silverstone as Heather Jasper Howe
Tim Blake Nelson as Dr. Jonathan Jacobo