How big of a career-maker is Sundance?

Well, three of this year's Director Guild of America nominees -- Darren Aronofsky, Christopher Nolan, and David O. Russell -- got their first break at Sundance, as did one of the biggest directing heavyweights in the biz, namely Quentin Tarantino, who hit it huge at the fest with the game-changing 'Reservoir Dogs' in 1992.

And long before most casting directors (not to mention the Academy) got wind of Maggie Gyllenhaal, Ryan Gosling, and Amy Adams, they were stars at Sundance.

Read on to see which actors and directors had the most life-changing trips to Park City.