Rigby's Graduation Day Special

David Michael Koechner is an American character actor, comedian and musician.After a breakout role as Champ Kind in Anchorman: The Legend of Ron Burgundy, he began appearing frequently with larger supporting roles in many high profile comedic films, including Talladega Nights, Snakes on a Plane, Waiting..., The Goods: Live Hard, Sell Hard, Extract and Thank You for Smoking, in addition to recurring guest appearances on Anchorman co-star Steve Carell's The Office as Todd Packer...(Wikipedia)

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: Kiss Kiss Bang Bang, Must Love Dogs, Over Her Dead Body, Open Water 2: Adrift and The Ultimate Gift

Credits include: Batman: Assault on Arkham, Batman vs. Robin, Batman: The Long Halloween, Part One, Batman: The Long Halloween, Part Two and Batman vs. Teenage Mutant Ninja Turtles

Credits include: Star Wars: The Bad Batch, Kingsglaive: Final Fantasy XV, Codename: Kids Next Door, Drifting Home and Legion of Super-Heroes

Credits include: Biohazard: Damnation, Suits, Mortal Kombat Legends: Snow Blind, OK K.O.! Let's Be Heroes and Relentless

Credits include: Regular Show and Regular Show: The Movie

Credits include: Regular Show, Batman: Gotham by Gaslight, Superman: Red Son, Batman: Return of the Caped Crusaders and Regular Show: The Movie

Credits include: Regular Show: The Movie, The Great North, Skunked, Terror Tales of the Park II and Do Me a Solid

Credits include: Regular Show, Regular Show: The Movie, 2 in the AM PM, The Power and Just Set Up the Chairs

Credits include: Close Enough, Over the Top, Grave Sight, More Smarter and Temp Check

Credits include: Caveman, Trucker Hall of Fame, Out of Commission, Exit 9B and TGI Tuesday