Jeanette Loff (October 9, 1906 – August 4, 1942) was an American motion picture actress and singer. Born Janette Lov was born in Orofino, Idaho. She was the eldest of a family of five children born to Morris and Inga Loff. Her parents were of Norwegian and Danish heritage. Her father was a professional violinist who moved their family to Canada when Jeanette was a child. Afterwards, the family moved to Lewiston, Idaho. At the age of 11, Loff played the title role in the play Snow White and the Seven Dwarfs. At 16 she was a lyric soprano and had the leading role in an operetta, Treasure Hunters. When she was seventeen the family moved to Portland, Oregon, where Loff continued her musical education at the Ellison-White Conservatory of Music. She played the organ in theaters in Portland as Jan Lov. Sometimes she appeared singing theater prologues during vacations from school. Jeanette Loff’s motion picture career began with an uncredited role in the silent film version of Uncle Tom’s Cabin. She was signed to a contract by Cecil B. DeMille, and was soon cast as in ingénue roles in almost every instance. This enticed her to take a break from her movie career and perform on stage. Her last screen role before she briefly retired was in the Paul Whiteman revue, The King of Jazz (1930). She remained under contract to Universal Pictures for some months but made no additional films. She went to New York City and appeared in musical plays and with orchestras. Loff returned to films with a role as a country girl in Mating Time. Her final motion picture performances came in Hide-Out, Flirtation, and Million Dollar Baby, all from 1934.

Jeanette Loff was married twice; her first marriage was to salesman Harry K. Roseboom, from whom she was divorced in 1929. Later, she wed Los Angeles businessman Bertram Eli Friedlob (1906-1956) to whom she remained married until her death. On August 4, 1942, Jeanette Loff died of ammonia poisoning in Los Angeles, California in 1942. She succumbed in a Hollywood hospital. Beverly Hills, California coroners could not determine whether she ingested ammonia either accidentally or intentionally. She was buried in the Forest Lawn Cemetery in Glendale, California. Loff was only thirty five years old. Four years after her death, her husband Bert Friedlob married actress, Eleanor Parker.