Gone with the Wind (1939)
Vivien Leigh and Clark Gable
In the former case, the finality of the film (granted it's a happy ending) is that the two will spend their life together, which generally means marriage but in the latter case, marriage isn't the end but rather the starting point of the thrills (aka troubles) or at least the mid-point.
The following movies have two things in common: they were all listed in the AFI's Top 100 Greatest American Romances and they feature a married couple for the most part of the film, if not the totality.
Which of these AFI's marital romances is your personal favorite?
After voting, you might discuss the list here