'Blue Valentine' Trailer Tugs the Heartstrings (and Guitar Strings)

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Get the box of tissues.  It's one of those trailers. 

Yahoo! Movies as unveiled the first look at "Blue Valentine," a romantic drama starring Ryan Gosling and Michelle Williams.  The film centers around a married couple and charts their rocky relationship by cross-cutting between different time periods.

"Blue Valentine" looks like it's going to be quite the experience.  When the trailer is this emotionally exhausting, imagine what the film itself is going to be like. 

The film, which recently received an NC-17 rating, made quite an impression at the 2010 Sundance Film Festival and later screened in the Un Certain Regard category at the Cannes Film Festival.  

"Blue Valentine" will open in theaters on Dec. 31.