Evadne Price, née Eva Grace Price (28 August 1888 – 17 April 1985), was an Australian-British writer, actress, astrologer and media personality. She also wrote under the pseudonym Helen Zenna Smith.
She is now best remembered for her World War I novel Not So Quiet (published in America as Stepdaughters of War) which adapts the style of Erich Maria Remarque's All Quiet on the Western Front to depict the experiences of British female ambulance drivers. During her lifetime she was known for her many romance novels, some of which were serialised in national newspapers, as well as for her children's books starring the popular character Jane Turpin. In the nineteen-fifties, she became a regular performer on television, as a storyteller and as an astrologer. For twenty-five years she published a monthly astrology column in SHE magazine.