Born Rebecca Benedict Heffener in York, Pennsylvania,[1] Darcy moved to Hollywood when she was 18 to pursue a career in acting.

She began her career using the name Rebecca Wassem and received her first role, uncredited, in the 1932 film Jewel Robbery.

Darcy's best known roles were as the female lead in cliffhangers, such as the 1939 film Zorro's Fighting Legion, in which she performed opposite Reed Hadley.

In Westerns, she often played opposite popular cowboy actors Ray "Crash" Corrigan and Max Terhune.

Her Hollywood career effectively ended following the release of Jungle Man in 1941, although a decade later she did have a bit part in one other film, Tomahawk.