I am searching for the name of a movie. It was about multiple fathers. A women collected support for a daughter from several GIs. No one knows about it until they all show up for the wedding. I think it may be black and white and set in France.

Buona Sera, Mrs. Campbell (1968)
The title character, Carla "Campbell" (Gina Lollobrigida), is an Italian woman who, during the American occupation of Italy, slept with three American GIs (a corporal, a sergeant, and a lieutenant) in the course of 10 days: Phil Newman (Phil Silvers), Justin Young (Peter Lawford), and Walter Braddock (Telly Savalas). By the time she discovers she is pregnant, all three have moved on, and she, uncertain of which is the father, convinces each of the three~who are unaware of the existence of the other two~to support his daughter, Gia, financially.
To protect her reputation, as well as that of her unborn child, Carla has raised the girl to believe her mother is the widow of an Army captain named Eddy Campbell, a name she borrowed from a can of soup.
The film opens 20 years after the end of World War II in the village of San Forino, where the three ex-soldiers attend a unitwide reunion in the village they liberated. The men are accompanied by their wives, and, in the Newmans' case, three obnoxious children. Carla is forced into a series of comic slapstick situations as she tries to keep them~each one anxious to meet his daughter (Janet Margolin) for the first time~from discovering her secret, while at the same time trying to keep Gia from running off to Paris to be with a much older married man who will take her to Brazil.

Buona Sera, Mrs. Campbell - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Buona_Sera,_Mrs._Campbell)