After marrying her high school boyfriend, Dan Ducich, in 1948, the couple lived in Butte, Montana, until their 1952 divorce, upon which Devry returned to California, working as a carhop at the Dolores Drive-In on Wilshire Boulevard.

Devry married Dan Ducich, her high school boyfriend, in Butte, Montana, in September 1948. The following year, Ducich was convicted of multiple robberies in Los Angeles and sentenced to five years probation. The couple resided in Butte, but divorced in 1952. She also had a six-year marriage to actor Mickey Rooney, whom she met in the fall of 1952, and married on November 15, 1952, in Las Vegas. They had a son, Jimmy, and a daughter, Jonelle.

She was billed as Elaine Davis in her early acting roles, including her first film, The Atomic Kid, in which she and Rooney co-starred. Devry made three guest appearances on Perry Mason, including the title role of defendant Janice Wainwright in the 1962 episode, "The Case of the Shapely Shadow." She also appeared in many other popular television series, including Bonanza, 77 Sunset Strip, Burke's Law, Family Affair, I Dream of Jeannie, Marcus Welby, M.D. and Tales of Wells Fargo.