John William "Will" Ferrell is an American comedian, impressionist, actor, and writer. Ferrell first established himself in the late 1990s as a cast member on the NBC sketch comedy show Saturday Night Live, and has subsequently starred in the comedy films Old School, Elf, Anchorman, Talladega Nights, Stranger than Fiction, Blades of Glory, Semi-Pro, and The Other Guys. He is considered a member of the "Frat Pack," a generation of leading Hollywood comic actors...(Wikipedia)

Zacharius Knight "Zach" Galifianakis is an American stand-up comedian and actor, known for his numerous film and television appearances including his own Comedy Central Presents special. While initially more of an "underground" comedian, he has garnered mainstream attention for his role in the Todd Phillips-directed comedy film The Hangover... - www.wikipedia.org

Credits include: Baby Driver, The Town, The Day the Earth Stood Still, The A-Team and We Were Soldiers