Year 1939 (MCMXXXIX) was a common year starting on Sunday (link will display the full calendar) of the Gregorian calendar. This year also marks the start of the Second World War, the deadliest human conflict in history.

Below, events of World War II have the WWII prefix.

Grace Ethel Cecile Rosalie Allen (July 26, 1895 – August 27, 1964), known as Gracie Allen, was an American comedian who became internationally famous as the zany partner and comic foil of husband George Burns. For contributions to the television industry, Gracie Allen was honored with a star on the Hollywood Walk of Fame at 6672 Hollywood Boulevard.

Gracie Allen was born in San Francisco, California, to George Allen and Molly Darragh, who were of Irish Catholic extraction. She made her first appearance on stage at age three and was given her first chance On Air by Eddie Cantor. She was educated at the Star of the Sea Convent School and during that time became a talented dancer. She soon began performing Irish folk dances with her three sisters, who were billed as "The Four Colleens." In 1909 Allen joined her sister, Bessie, as a vaudeville performer. At a performance in 1922 Allen met George Burns and the two formed a comedy act. The two were married on January 7, 1926, in Cleveland, Ohio. Gracie allen was born with two different color eyes on blue and one green.

Alexander Graham Bell (March 3, 1847 – August 2, 1922) was an eminent scientist, inventor, engineer and innovator who is credited with inventing the first practical telephone.

Bell's father, grandfather, and brother had all been associated with work on elocution and speech, and both his mother and wife were deaf, profoundly influencing Bell's life's work. His research on hearing and speech further led him to experiment with hearing devices which eventually culminated in Bell being awarded the first US patent for the telephone in 1876. In retrospect, Bell considered his most famous invention an intrusion on his real work as a scientist and refused to have a telephone in his study.

Many other inventions marked Bell's later life, including groundbreaking work in optical telecommunications, hydrofoils and aeronautics. In 1888, Bell became one of the founding members of the National Geographic Society. He has been described as one of the most influential figures in human history.

Alexander Bell was born in Edinburgh, Scotland on March 3, 1847. The family home was at 16 South Charlotte Street, and has a stone inscription, marking it as Alexander Graham Bell's birthplace. He had two brothers: Melville James Bell (1845–70) and Edward Charles Bell (1848–67). Both of his brothers died of tuberculosis. His father was Professor Alexander Melville Bell, and his mother was Eliza Grace (née Symonds). Although he was born "Alexander", at age 10, he made a plea to his father to have a middle name like his two brothers. For his 11th birthday, his father acquiesced and allowed him to adopt the middle name "Graham", chosen out of admiration for Alexander Graham, a Canadian being treated by his father and boarder who had become a family friend. To close relatives and friends he remained "Aleck" which his father continued to call him into later life.

James Maitland "Jimmy" Stewart (May 20, 1908 – July 2, 1997) was an American film and stage actor, known for his distinctive voice and persona. Over the course of his career, he starred in many films widely considered classics and was nominated for five Academy Awards, winning one in competition and receiving one Lifetime Achievement award. He was a major MGM contract star. He also had a noted military career and was a World War II and Vietnam War veteran, who rose to the rank of Brigadier General in the United States Air Force Reserve.

James Maitland Stewart was born on May 20, 1908, in Indiana, Pennsylvania, the son of Elizabeth Ruth (née Jackson) and Alexander Maitland Stewart, who owned a hardware store. Stewart's parents were of Scottish descent and Presbyterians. His maternal ancestors served in the American Revolution, the War of 1812 and the American Civil War. The eldest of three children (he had two younger sisters, Virginia and Mary), he was expected to continue his father's business, which had been in the family for three generations. His mother was an excellent pianist but his father discouraged Stewart's request for lessons. But when his father accepted a gift of an accordion from a guest, young Stewart quickly learned to play the instrument, which became a fixture off-stage during his acting career. As the family grew, music continued to be an important part of family life.

Jesse Woodson James (September 5, 1847 – April 3, 1882) was an American outlaw, gang leader, bank robber, train robber and murderer from the state of Missouri and the most famous member of the James-Younger Gang. Already a celebrity when he was alive, he became a legendary figure of the Wild West after his death. Some recent scholars place him in the context of regional insurgencies of ex-Confederates following the American Civil War rather than a manifestation of frontier lawlessness or alleged economic justice.

Jesse and his brother Frank James were Confederate guerrillas during the Civil War. They were accused of participating in atrocities committed against Union soldiers. After the war, as members of one gang or another, they robbed banks, stagecoaches and trains. Despite popular portrayals of James as a kind of Robin Hood, robbing from the rich and giving to the poor, there is no evidence that he and his gang used their robbery gains for anyone but themselves.

The James brothers were most active with their gang from about 1866 until 1876, when their attempted robbery of a bank in Northfield, Minnesota, resulted in the capture or deaths of several members. They continued in crime for several years, recruiting new members, but were under increasing pressure from law enforcement. On April 3, 1882, Jesse James was killed by Robert Ford, who was a member of the gang living in the James house and who was hoping to collect a state reward on James' head.