Yulia Slonimskaya Sazonova (Russian: Юлия Леонидовна Слонимская Сазонова, 19 September 1884 – 18 November 1957) was a Russian-born writer, theater critic and historian, actress, and puppeteer. Fleeing Russia after the October Revolution, she moved to France and continued her craft. She wrote and performed marionette shows in Europe and was one of the most prolific women dance and theater critics of the first half of the twentieth century. When World War II broke out, she moved to Portugal and later the United States, before returning to Paris.