Boba Fett was the clone son of bounty hunter Jango Fett, created as part of Jango's payment from the Kaminoans for serving as the genetic donor for the clone troopers of the Grand Army of the Republic. Jango was killed by Jedi Master Mace Windu during the early stages of the First Battle of Geonosis, an event Boba witnessed.
Boba eventually fell into the care of fellow bounty hunters Aurra Sing and Bossk, both of whom had previously worked with Jango. Sing encouraged the boy to seek revenge against Windu for the death of his father.