Andrea King was born Georgette André Barry in Paris, France in 1919 to American Lovinia Belle Hart. At two months of age, she moved with her mother to the United States. She lived with her grandmother in Cleveland, Ohio, and Palm Beach, Florida, for the first four years of her life while her mother attended Columbia University in New York City. When her mother married Douglas McKee, King went to live with them in Forest Hills, Queens. As a teenager King attended the progressive Edgewood School in Greenwich, Connecticut, a northern campus of Marietta Johnson’s Organic School of Education. Playing Juliet in a school production when she was 14, she was asked to audition for a role in a Lee Shubert play, which led to other stage work. Andrea King appeared in Broadway plays and other theater work, most notably as Mary Skinner in Life with Father. Her film debut was in a docudrama, The March of Time’s first feature-length film titled The Ramparts We Watch (1940). In 1944, she signed with Warner Bros. and changed her stage name to King (some of her early movies have her credited as “Georgette McKee”, her stepfather’s name). King appeared uncredited in the Bette Davis film Mr. Skeffington (1944), and went on to do another ten movies in the next three years. She co-starred in a 1946 horror film, The Beast with Five Fingers, and a 1947 drama, The Man I Love, both opposite Robert Alda. She originally was cast to play Dr. Lilith Ritter in Edmund Goulding’s film noir classic Nightmare Alley, but she chose instead a memorable role as sophisticated Marjorie Lundeen in Ride the Pink Horse (1947). In the 1950s, King had leading roles in the similarly titled film noirs Dial 1119 and Southside 1-1000 and a science-fiction story, Red Planet Mars. She later played supporting roles in Hollywood feature films like The World in His Arms with Gregory Peck and Band of Angels with Clark Gable.

In the 1960s and 1970s, most of her acting work was on television, including the ABC/Warner Brothers western series Maverick‍‍ ’​‍s episode “Two Tickets to Ten Strike” opposite James Garner. In 1959–1960, King appeared twice as “Duchess” in the episodes “The Blizzard” and “The Devil Made Fire” of another ABC/WB western series, The Alaskans, starring Roger Moore, Jeff York, Ray Danton, and Dorothy Provine, as well as in multiple episodes of the ABC/WB private-eye series 77 Sunset Strip and Hawaiian Eye. She made four guest appearances on Perry Mason between 1959–1963, including the role of murderer Barbara Heywood in the 1959 episode, “The Case of the Bedeviled Doctor”. King continued to act on television through 1990 when she played her final role on the Murder, She Wrote episode, “The Fixer-Upper”. She appeared twice more as herself on the A&E series, Biography, recalling her work with Peter Lorre and Montgomery Clift. The Warner Bros. studio photographers voted King the most photogenic actress for the year 1945. For her contribution to television she received a star on the Hollywood Walk of Fame in February 1960. According to her Los Angeles Times obituary, King was married to lawyer Nat Willis from 1940 until his death in 1970. She died in Woodland Hills, California and was survived by a daughter and three grandchildren.