Hélène Smith (real name Catherine-Elise Müller, December 9, 1861, Martigny – June 10, 1929, Geneva) was a famous late-19th century French medium.
She was known as "the Muse of Automatic Writing" by the Surrealists, who viewed Smith as evidence of the power of the surreal, and a symbol of surrealist knowledge.
Late in life, Smith claimed to communicate with Martians, and to be a reincarnation of a Hindu princess and Marie Antoinette.