Miriam Marx (born May 19, 1927) is an author and the daughter of Groucho Marx, and his first wife, Ruth Johnson. Her brother was Arthur Marx. Her married name is Miriam Allen. Besides having worked for a time on her father's quiz show, she has appeared in several Marx Brothers documentaries. In her book, Love Groucho: Letters from Groucho Marx to His Daughter Miriam, she detailed her difficult relationship with Groucho, her battle against addictive substances, and her eventual reconciliation with her father.