Samuel Leroy Jackson is an American film and television actor and film producer. After gaining critical acclaim for his role in Jungle Fever in 1991, he appeared in films such as Patriot Games, Amos & Andrew, True Romance and Jurassic Park. In 1994 he was cast as Jules Winnfield in Pulp Fiction, and his performance received several award nominations and critical acclaim. Jackson has since appeared in over 100 films... (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

Tobey Maguire is best known as the titular star of the Spider-Man movies. Born a stone's throw from Hollywood, he began acting in commercials as a boy and had his first film role in This Boy's Life (1994, with Leonardo DiCaprio). He went on to play confused and thoughtful teens in several films, including the trouble-in-suburbia classic The Ice Storm (1997, with Christina Ricci), the dreamy Pleasantville (1998, with Reese Witherspoon) and the literary campus comedy The Wonder Boys