Star Chemistry: Hollywood's Top Partnerships

Film Collaborations: Unforgiven, Million Dollar Baby, Invictus.

Film Collaborations: Best in Show, A Mighty Wind, For Your Consideration, Waiting for Guffman, Almost Heroes.

Film Collaborations: Reservoir Dogs, Pulp Fiction, Inglorious Basterds.

Film Collaborations: Edward Scissorhands, Ed Wood, Sleepy Hollow, Charlie and the Chocolate Factory, Sweeney Todd: The Demon Barber of Fleet Street, Alice in Wonderland.

Film Collaborations: Mean Streets, Taxi Driver, Raging Bull, The King of Comedy, Goodfellas, Cape Fear, Casino.

Film Collaborations: Gangs of New York, The Aviator, The Departed, Shutter Island.

Film Collaborations: Zoolander, Starsky & Hutch, The Cable Guy, The Royal Tenenbaums, Meet the Parents, Little Fockers.

You don't have to be a film buff to notice that there are duos in Hollywood that tend to team up for the same projects. We've compiled some of the greatest Hollywood duos ever in our Star Chemistry gallery, starting with Denzel Washington and Spike Lee, whose film collaborations include Mo' Better Blues, Malcolm X, He Got Game, and Inside Man.