Helene Hanff was an American writer born in Philadelphia, Pennsylvania. She is best known as the author of the book 84, Charing Cross Road, which became the basis for a stage play, television play, and film of the same name.

84, Charing Cross Road is a 1970 book by Helene Hanff, later made into a stage play, television play, and film, about the twenty-year correspondence between the author and Frank Doel, chief buyer of Marks & Co antiquarian booksellers, located at the eponymous address in London, England.