Aldridge was the daughter of Langworthy and Maude Marchant, and moved with her family to Washington, D.C. at age six.
After earning her undergraduate degree, followed in 1933 by her law degree from the National University of Washington, D.C. (now George Washington University), she was admitted to practice in Virginia and Washington D.C., and before the U.S. Court of Claims and the U. S. Supreme Court.
She served the World Bank as an attorney in the Legal Department for 18 years until retiring in 1972.