The family moved to Los Angeles when Ethel was young, and she and her younger sister Garna attended high school in Santa Monica.
When Dore Schary first went to work for Columbia Pictures as a new screenwriter, he was paired with the veteran Hill to learn from her; together, they wrote the screenplay for Fury of the Jungle (1933).
[4] Hill was described by Marc Norman in his book What Happens Next: A History of American Screenwriting as "an extremely dear and generous woman [who] had an interest in horses and often wore jodhpurs and riding gear to the studio.
"[4] Fellow screenwriter Gertrude Walker—who worked with Hill toward the end of her career at Republic Pictures—described her as "a sweet old lady" who always wore a shawl and bedroom slippers.
[5] Hill bought the Thoroughbred race horse War Knight, a son of Preakness winner High Quest, as a foal "with her $1500 life savings".