Duprezwas born in Teddington, Middlesex, England, during an air raid in the final months of World War I, the daughter of American comedian Fred Duprez[1] and Australian Florence Isabelle Matthews.

Clifford Odets' grim None But the Lonely Heart (1944), in which she co-starred with Cary Grant and Ethel Barrymore, started a brief return to films of higher production values.

She appeared in "The Last Tycoon," an episode of the TV show Robert Montgomery Presents in 1951, and her final credited film performance was in One Plus One (1961), also titled Exploring the Kinsey Reports.

They sold or pawned jewels to stay afloat financially, and eventually Duprez sent her mother to Australia, where she had access to the British funds.

[1] Duprez married Frederick Beauchamp, a wealthy Harley Street doctor in 1935; they divorced in 1942 when his jealousy of her film stardom had eroded their marriage.