She was born in 1933 as Beverly Josephine Williams in Los Angeles to actress/comedian Joan Davis and actor/writer Si Wills. Wills made her film debut in George White's Scandals (1945) when she was 11 years old. Mickey (1948) followed three years later.
In 1952, at the age of 18, Wills appeared with her mother and Jim Backus in the TV comedy, I Married Joan (1952–55). She played the younger sister to her real-life mother. After the series ended its run, Wills appeared in only four more films including Some Like It Hot (1959) and Son of Flubber (1963).
Wills' first marriage was to Lee Bamber, a Pasadena fireman, in 1952. Bamber and Wills eloped to Carson City, Nevada. The couple divorced in 1953. She was later married to Alan Grossman on July 12, 1954; the couple had two sons. Wills and Grossman divorced and she was remarried to Martin Colbert.
On October 24, 1963, Wills died in a house fire with her grandmother, Nina Davis, and two sons, Guy and Larry Grossman. She was 30 years old. Her mother, Joan, had previously died from a heart attack in 1961.
