The following actors are featured in Happy Halloween, Scooby-Doo!
Frank WelkerAlso starred in: Scooby-Doo and Guess Who? , The Smurfs , Curious George |
Matthew LillardAlso starred in: Scooby-Doo and Guess Who? , Scream , She's All That |
Grey GriffinAlso starred in: Scooby-Doo and Guess Who? , Scooby-Doo And The Cyber Chase , Dan Vs. |
Kate MicucciAlso starred in: Scooby-Doo and Guess Who? , Scooby-Doo! & Batman: The Brave and the Bold , Little Big Awesome |
Cassandra PetersonAlso starred in: Elvira's Movie Macabre: The Satanic Rites of Dracula , King of the Mountain , Jekyll & Hyde...Together Again |
Bill NyeAlso starred in: Bliss , Fight For Space |