An astonishing number of movies have a wedding in them somewhere, some more memorable than others. From the first glimpse of the bride, to the objection by the poor-but-deserving ex, to the punches thrown, they wouldn’t be in the film if they weren’t entertaining in some way.
Burger Fiction assembled tons of wedding clips from (most comedy) movies. There’s a list of them at the YouTube page. You’ve seen most of these movies already, and if you have a favorite wedding scene, it’s probably in here. (via Tastefully Offensive)