Catherine Cusack (born 21 December 1968) is a British actress.
She is best known for portraying Nanny Carmel Finnan in the long-running ITV soap opera Coronation Street in 1992 and 1993.
She was accepted to study at Royal Holloway and Bedford New College, but became a stage manager at the Tricycle Theatre in London.
She performed on stage with her half-sister Sinéad Cusack in Our Lady of Sligo by Sebastian Barry at the National Theatre in London, the Gate Theatre, Dublin and the Irish Arts Centre in New York.
Catherine Cusack is married to the British actor Alex Palmer.