Romantic Comedy (1983)

IMDB
Genre : Comedy, Romance
TRAILER
Director : Arthur Hiller
Stars : Dudley Moore, Mary Steenburgen, Frances Sternhagen, Janet Eilber
Plot : A successful playwright employs a new female writing partner, and it's love on first sight, but it happens to be the day he gets married. They both suppress their feelings for each other in order to form a successful writing partnership.