Have you heard of this new movie coming out, Made of Honor?
Basic premise: guy and girl have been best friends forever. Guy never ties the knot with a girl because he's assumed to be a casanova. As soon the girl gets engaged, guy friend falls wildly in love with his best friend. He then tries to break up his best friend's wedding, and win the girl.
Where have we heard this story before?
My Best Friend's Wedding. One of the only chick flicks I've ever grown to love. I don't care how McDreamy you may be Patrck Dempsy. Julia trumps you forever.