RX-24, nicknamed Rex, was an RX-Series pilot droid manufactured by Reubens Robotic Systems. The masculine-programmed droid was purchased by the Star Tours travel agency at some point after the rise of the Galactic Empire, and prior to 1 BBY, but he was defective as of 1 BBY and saw no service until after the company upgraded its fleet of StarSpeeder 1000 spacecraft to the newer StarSpeeder 3000 sometime around the Battle of Endor in 4 ABY.