After the war, Morgan returned to France and quickly resumed her career with the film "La Symphonie Pastorale" (1946) directed by Jean Delannoy, which earned her the Best Actress award at the Cannes Film Festival. Her other films from this period include; Carol Reed's "The Fallen Idol" (1948), "Fabiola" (1949), "The Proud and the Beautiful" (1953) by Yves Allégret, "Les Grandes Manœuvres" (1955) by René Clair and "Marie-Antoinette reine de France" (1956). She continued working in films throughout the 1960s, such as in "Lost Command" (1966), a version of "Les Centurions". In the 1970s, she virtually retired from her acting career, then made only occasional appearances in film, television and theatre.