Until September Cast

Karen Allen plays Mo Alexander, an American woman who unexpectedly falls in love with a Frenchman in Paris.

Thierry Lhermitte portrays Xavier de la Perouse, the Frenchman who captures Mo's heart in Paris.

Christopher Cazenove takes on the role of Philip, a character involved in the romantic entanglements in the film.

Hutton Cobb plays Andrew, a part of the ensemble cast involved in the interwoven relationships in the movie.

Michael Mellinger portrays Colonel Viola, a character who likely adds depth to the storyline of Until September.

Nitza Shaul plays Sylvia, a character who contributes to the unfolding drama and romance in Until September.

Rachel Robertson takes on the role of Carol, a character with a part in the various relationships depicted in the film.

Maryam d'Abo portrays Nathalie, a character involved in the romantic and cultural clashes of Until September.