Helen Ann Richardson Khan (born as Helen Ann Richardson; 21 November 1938), known mononymously as Helen, is an Indian actress and dancer. She has appeared in over 1000 films, making her a prolific performer in Hindi cinema. She is known for her supporting, character roles and guest appearances in a career spanning seventy years.

Helen has received two Filmfare Awards, and is often cited as one of the most popular nautch dancers of her time. In 2009, Helen was awarded with the Padma Shri by the Government of India. She was the inspiration for four films and a book.