"The Accidental Husband"

... romantic comedy with Uma Thurman, Colin Firth, and Jeffrey Dean Morgan.  Includes a cameo of Isabella Rossellini. Rented the movie on a whim.  Glad we did.  Plot and ending are pretty much standard fare for a romantic comedy.  Still liked the funny moments enough to rate this one a first date movie.  More on the plot, see IMDB's link.