Two Wives at One Wedding (1961)

Tom and his new bride's big day takes a turn for the worse when a Frenchwoman arrives uninvited, claiming to be Tom's wife Annette, with whom Tom had a romance at the end of the war when he was injured near Normandy and she nursed him back to health. It is then that Annette claims the marriage took place, something Tom doesn't remember, She is willing to divorce Tom, but only with a £10,000 settlement. With a promising career in the balance, he must find out if Annette is really telling the truth.