Exclusive Trailer! Gosling and Williams in 'Blue Valentine'

Ryan Gosling and Michelle Williams star in the romantic drama "Blue Valentine," playing a couple who fall fiercely in love -- and just as fiercely out of it. A 2010 Sundance Film Festival hit, the film is an intimate, shattering portrait of a disintegrating marriage. Watch the trailer.

For a complete guide to the 2010 fall movies, click here!

"Blue Valentine" opens in theaters Dec. 31.