Until September is a 1984 romantic drama set in France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. It stars Karen Allen

Karen Allen

Karen Jane Allen is an American actress best known for her role as Marion Ravenwood in Raiders of the Lost Ark and Indiana Jones and the Kingdom of the Crystal Skull...

 as an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 tourist in Paris

Paris

Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

 who falls in love with a married Frenchman (Thierry Lhermitte

Thierry Lhermitte

Thierry Lhermitte is a French actor, known for his comedic roles. He was one of the founders of the comedy troupe Le Splendid in the 1970s, along with, among others, his high-school friends Christian Clavier, Gérard Jugnot, and Michel Blanc...

).

Her name is Moe Alexander. She owns a landscaping business in St. Louis, and he (Thierry) is an international banker in France. They meet after she misses her plane, and ends up being stuck in Paris for a while until her visa gets approved. She goes to a friend's apartment who is away for the summer, (lets her use her apartment) and she ends up staying next door to Xavier.