Françoise-Éléonore Villain (1761 in Liège, Prince-Bishopric of Liège – Stockholm 26 March 1783) was a Liégeois actress known under her stage name Mlle Baron or Mademoiselle Baron the Younger. She was engaged in Sweden in The French Theater of Gustav III from 1781 until 1783, where she was viewed as one of its most prominent members, and she is also known in history as the lover of Charles XIII of Sweden.