Mark Richard Hamill grew up in California, Virginia, New York and Japan; his father was a captain in the United States Navy. He played a continuing role (Kent Murray) in the soap opera "General Hospital". Real fame came with his film debut with the hero role of Luke Skywalker in Star Wars (1977), Star Wars: Episode V - The Empire Strikes Back (1980) and Star Wars: Episode VI - Return of the Jedi (1983)...(imdb)

Credits include: Avatar: The Last Airbender, Invincible, Batman: Year One, Justice League: Doom and Star Wars: Clone Wars

David Cross (born April 4, 1964) is an American actor, writer and stand-up comedian perhaps best known for his work on HBO's sketch comedy series Mr. Show and for his role as Tobias Fünke in the Fox sitcom Arrested Development.Cross currently stars in The Increasingly Poor Decisions of Todd Margaret and had a recurring role in the 2010 FOX sitcom Running Wilde...(Wikipedia)

Credits include: Scooby-Doo, Scooby-Doo on Zombie Island, Scooby-Doo and the Cyber Chase, Scooby-Doo and the Alien Invaders and Scooby-Doo and the Witch's Ghost

Frank Welker was born in Colorado. He followed his dream in California, and started a voice acting career which has amassed over five decades of hundreds of credits, accolades, and friends. Frank worked with fellow voice actors Casey Kasem, Nicole Jaffe, Don Messick, Heather North, and Indira/Stefanianna Christopherson on Hanna-Barbera's iconic Scooby-Doo, Where Are You!, voicing Fred Jones, among other Scooby credits over the years.

Credits include: An American Carol, Diff'rent Strokes, Midgets Vs. Mascots, The Kid with the Broken Halo and A Carol Christmas

Credits include: Scooby-Doo on Zombie Island, Scooby-Doo and the Cyber Chase, Scooby-Doo and the Alien Invaders, Scooby-Doo and the Witch's Ghost and The Scooby Doo Project

Credits include: Night Of The Living Doo