Miss Pettigrew Lives for a Day (2008)

In pre-World War II London, a desperate middle-aged English governess, Guinevere Pettigrew (Frances McDormand), has just been fired from her fourth job. She manages to finagle her way into a new assignment, but instead of a governess, she becomes entangled in the personal love life of a glamorous American entertainer, Delysia Lafosse (Amy Adams). Before the end of the day, both of their lives will have changed forever.