when does luke skywalker find out leia is his sister
Princess Leia In Return of the Jedi (1983), Leia infiltrates Jabba's palace on Tatooine disguised as the Ubese bounty hunter Boushh, and brings a captive Chewbacca with her as part of the ruse. She frees Han from the carbonite, but they are recaptured by Jabba. Leia is now chained to Jabba as his slave, outfitted in a metal bikini. After Luke arrives and kills Jabba's Rancor, Jabba sentences Luke, Han and Chewbacca to be fed to the Sarlacc. Lando (disguised as a guard) helps them overpower their captors, and Leia seizes the moment to strangle Jabba with her chain. Luke and Leia swing to safety, blowing up Jabba's barge behind them. Later, the heroes go to the forest moon of Endor to prepare for a battle with the Empire. There, Luke reveals to Leia that she is his twin sister and that Vader is their father. Leia joins Han in leading the Rebels in battle with Imperial troops as the Rebel Fleet attacks the second Death Star. Leia is slightly injured, but the Rebels, with help from the Ewoks, defeat the forces of the Empire.
The Empire Strikes Back Vader intends to hold Luke in suspended animation via carbon freezing, and selects Han to be frozen as a test subject. Han survives the process and is given to Fett, who intends to deliver Han to Jabba the Hutt. Lando initiates an escape and frees Leia and the others, but they are too late to stop Fett from departing with Han. They fight their way back to the Falcon and flee Cloud City. Meanwhile, Luke arrives at Cloud City and engages with Vader in a lightsaber duel that leads them over the city's central air shaft. Vader severs Luke's right hand, disarming him; when Luke refuses to join Vader against the Emperor, accusing him of murdering his father, Vader reveals that he, in fact, is his father. Horrified by the truth, Luke intentionally falls into the air shaft and is ejected beneath the floating city, where he grabs onto an antenna. He makes a telepathic plea to Leia, who senses it and persuades Lando to return for him in the Falcon. After Luke is brought on board, they are chased by TIE fighters but R2-D2 reactivates the Falcon's hyperdrive, allowing them to escape.