The Prom (1931)

Two middle-class notions dealers live happily with their girl, but an inheritance turns these nice people into snob Nouveaux Riches. Although the aristocracy invites them, the 'Tout-Paris' laughs behind their back. When they invite their would be new friends for a ball in their desirable new mansion, their daughter, sick and tired of being abandoned by her once loving parents, throws the invitations into the Seine.