Myra Belle Shirley was born in Carthage, Missouri, on 5th February, 1846. During the American Civil War she worked as a courier for Confederate guerillas.
In 1866 Belle had a relationship with Cole Younger. She gave birth to a daughter, Pearl, but it is unclear who was the father of the child. She later married James Reed in Texas, but in 1870, her husband became a fugitive when he killed a man in a fight. Reed became an outlaw and took part in a $30,000 robbery in November, 1973. Two years later Reed was killed by a bounty hunter.
Belle now became an outlaw and along with a gang that included Jack Spaniard, Jim French and Blue Duck, was involved in stealing horses. In 1880 Belle married Sam Starr, a Cherokee.
On 3rd February 1889 Belle Starr was murdered by an unknown assassin in Oklahoma.