| Is a licensed interior decorator and a licensed pilot. |
| Made her screen debut in 1935's No More Ladies billed as Joan Burfield; has also used the name Joan St. John. |
| Costarred with her mother in Ivy and The Bigamist. |
| Autobiography No Bed of Roses was published in 1978. |
| Is vice-president emeritus of the Episcopal Actors' Guild of America. |
| Had a hole-in-one at both California's Cypress Point and Carmel Valley Golf Clubs. |
| She and Olivia de Havilland were the first sisters to win Oscars and the first ones to be Oscar-nominated in the same year, 1941 (Joan won for Suspicion and Olivia was nominated |
| Favorite leading man was Charles Boyer, her costar in 1943's The Constant Nymph. |