Myriam Cyr (born 1960) is a Canadian actress and writer. As an actress she is best known for her roles as Claire Clairmont in the 1986 horror film Gothic and Ultra Violet in the 1996 biopic I Shot Andy Warhol. In 2006 she published the non-fiction work Letters of a Portuguese Nun: Uncovering the Mystery Behind a 17th Century Forbidden Love.