Born in El Paso, Texas, Lynne Roberts was the daughter of Hobart M. Roberts, a bookkeeper, and May Holland. The family moved to Los Angeles in the 1920s. Lynne Roberts began working as an actress in the 1930s, under contract to Republic Pictures. At the age of 14, in 1936, she played a role in Bulldog Edition. In 1938, at age 16, she starred in the cliffhangers: The Lone Ranger and Dick Tracy Returns, and played a role in The Higgins Family. She was officially listed in studio records as having been born in 1919. In 1941 she starred with Sonja Henie and John Payne in Sun Valley Serenade, while under contract to 20th Century-Fox. She returned to Republic Pictures in 1944, and stayed under contract there until 1948. She starred with Gene Autry in Sioux City Sue in 1946, and appeared in two more films with Autry: Robin Hood of Texas and Saddle Pals, as well as three films with Roy Rogers, and one with Monte Hale. After leaving Republic Pictures for the second time, Lynne Roberts worked with Autry in outdoor adventures for Columbia Pictures. She also worked with Kirby Grant in Monogram Pictures’ mounted-police adventures, and with Tim Holt at RKO Radio Pictures. All told, Roberts appeared in 64 films. Of those, 21 were westerns, and two are serials. Roberts married four times. Her first marriage was to William Engelbert, Jr., with whom she had one son, Bill. The marriage ended in divorce in 1944. Her second marriage was to Louis John Gardella, which also ended in divorce. In court, Gardella’s attorney argued that the couple’s Arizona wedding was invalid because Roberts was not legally divorced from Engelbert, although Roberts claimed she had a Mexican divorce decree.

In 1953, Lynne Roberts married brassiere manufacturer Hyman B. Samuels, with whom she had a daughter, Peri Margaret. Following the divorce from her third husband in 1961, Roberts retired from acting and later married pro wrestler Don Sebastian in 1971. On December 16, 1977, Roberts fell in the bathroom of her home, striking her head. She lapsed into a coma, and died on April 1, 1978.