Captain Antilles from the original Star Wars movie was in charge of the Corellian Blockade Runner, the Alderaan consular ship Tantive IV.
He was not related to X-wing pilot Wedge Antilles as the name Antilles was very common throughout the galaxy.
Captain Antilles received orders from Senator Bail Organa
Captain Antilles’ name was Raymus Antilles who served the Alderaan Fleet under Senator Bail Organa during the Clone Wars and the beginning of the Rebellion against the Galactic Empire.
Captain Antilles was an experienced pilot who had captained the Corvette Sundered Heart for many years, and under Bail Organa’s command helped the Jedi Masters Obi-Wan Kenobi and Yoda escape Coruscant after the transmission of Order 66 designed to wipe out the Jedi.
“We intercepted no transmissions. This is a consular ship… We’re on a diplomatic mission…”
“If this is a consular ship, where is the ambassador?“―Captain Antilles and Darth Vader
But Antilles was most famous for helping steal the Death Star plans 19 years later. He commanded Blue Squadron that used X-wings as scouts for the Tantive IV.
However, Captain Antilles mission became unstuck when his ship was unable to escape the Tatooine system due to an Interdictor cruiser activating its gravity well which prevented any ship close by from entering Hyperspace. This allowed the Star Destroyer Devastator to intercept and capture the Tantive IV.
After storming the ship with his troops, Darth Vader murdered Captain Antilles after he refused to tell the Sith Lord where the Death Star plans were. Fortunately for the rebels, Princess Leia uploaded the plans into R2D2 who escaped to the surface of Tatooine via an escape pod along with C3PO.
Who played Captain Antilles?
George Lucas thought that Denis Lawson, the actor that played Wedge Antilles in the original trilogy, might make a cameo as Raymus Antilles (much as Jeremy Bulloch who played Boba Fett had a cameo as Captain Jeremoch Colton who was also stationed on the Sundered Heart as a pilot). However, Lawson turned down the offer, and Lucas returned to his original choice, Nichol. Denis Lawson would later turn down yet another role for Wedge Antilles in The Force Awakens.