Trivia

Dru and Zsa Zsa Gabor worked together on 3 Ring Circus (1954) but did not like each other and clashed often. After one particular incident in which Dru got the better of Gabor, Zsa Zsa said, "I'll get even with you if it takes forever." Dru replied, "It probably will, but aren't you rather old to talk about a future?".

Her marriage to John Ireland broke down due to his affair with Queen Bee (1955) co-star Joan Crawford.

Her mother was president of the Motion Picture Mothers 1975-1976.

She has appeared in two films that have been selected for the National Film Registry by the Library of Congress as being "culturally, historically or aesthetically" significant: Red River (1948) and All the King's Men (1949).

Best friends with Helen O'Connell.

Sister-in-law of Laurie Marshall.

Body Cremated and Ashes scattered at sea.

Brother Peter Marshall.

Ex-sister-in-law of Sally Carter-Ihnat.

In Italy, most of her films were dubbed by Dhia Cristiani. She was occasionally dubbed by Rina Morelli, like in My Pal Gus (1952) and Thunder Bay (1953); and once by Clelia Bernacchi in Wagon Master (1950).