Following the Wampa attack during the movie's opening scenes on Hoth; Leia, Han, and Chewie visit Luke in the infirmary. Leia is annoyed with Han, who insists she has feelings for him, so she kisses Luke to prove she doesn't. Presumably, the scene was simply meant to make Han jealous.
While Leia is denying Han's assertion that she has romantic feelings for Han, Leia kisses Luke passionately to demonstrate that Han "doesn't know everything about women" and to suggest that she has feelings for Luke instead.
That's all you get. It's well known that Star Wars lead characters Luke Skywalker and Princess (now General) Leia are brother and sister. The estranged siblings didn't know about their familial relationship until "Return of the Jedi." They even shared a passionate kiss in the previous movie, "The Empire Strikes Back."
After Leia and Luke's lips lock in Lannister love, our wookie friend vocalizes what seems to be his approval. However in hindsight, Chewie was more than likely saying “Your species' obsession with sibling mating is a curious one, I've seen your browser histories”.
Leia kissed Luke three times: once on the cheek “for luck” right before the swing across on the first Death Star, and once rather forcefully in the sickbay on Hoth (when she's trying to make a point to Han.)
5. Love triangles and awkwardness — The Empire Strikes Back wasn't the first inkling that Luke and Leia had feelings for each other. Their romance was heavily alluded to in A New Hope, what with all of Luke's suggestive facial expressions to Han whenever Leia was around, and Han's clear attraction to Leia.
By the end of Episode V: The Empire Strikes Back, Leia professes her love for Han, telling him “I love you. Han — just before being frozen in carbonite — smoothly replies, “I know,” — sealing their love for one another permanently.
While a mistake in real life, the canon reason that Leia embraces Rey before Chewbacca is due to Leia seeing Rey as a lost soul and surrogate daughter, establishing a strong relationship that will grow through the sequel trilogy.
During the iconic opening moments of Star Wars: A New Hope, Darth Vader has a tense confrontation with Princess Leia, an adversary who, unknown to him, is actually his daughter. Despite participating in Leia's interrogation, the Sith Lord doesn't uncover his familial connection with the rebellious royal.
“Why, you stuck-up, half-witted, scruffy-looking nerf herder!” This is arguably Princess Leia's most memorable diss, aimed at Han Solo in the Rebel base on Hoth. It's a bit of a tongue-twister at times, but if you can perfect the cadence, it certainly is useful in a good number of situations.
Star Wars is finally exploring Leia's emotional reaction to the revelation Darth Vader was really her father - as her identity is transformed. Star Wars has finally revealed Princess Leia's reaction to learning Darth Vader was her father.
At some point between A New Hope and The Empire Strikes Back, Darth Vader learned that Luke Skywalker is his son, but when did he discover this?
Mara Jade Skywalker is a fictional character in the Star Wars franchise. She appears in the now non-canon Legends series as the wife of Luke Skywalker and mother of Ben Skywalker. She has been voiced by Heidi Shannon, Edie Mirman and Kath Soucie in various Star Wars video games.
There is a deleted scene from The Empire Strikes Back that makes the kiss between twins Leia and Luke even more uncomfortable due to their now-known relationship as biological brother and sister. In an alternate version of the scene featured in the movie, Leia is remarkably more affectionate toward her brother.
Luke and Leia only discovered they were twins in Return of the Jedi despite being Force-sensitive.
No, she didn't consciously know this - i.e. she wasn't aware of it. Leia meant that the connection she always felt towards Luke now made sense - the one that she originally misinterpreted as sexual love, but realised was (appropriately enough), sisterly love.
While their affection had to remain hidden, the two kept in frequent contact, even throughout the Clone Wars. But despite this, Anakin found out that Padme was pregnant only a couple of weeks before the twins were born. So, why did it take so long for her to tell him?
In Legends, Luke and Leia do eventually discover their mother's identity during the Swarm War Trilogy.
Reva knows that Anakin Skywalker is Darth Vader because she was one of his targets—a child—during the Order 66 killings that took place during the events of Star Wars Episode III: Revenge of the Sith.
Theory 1: Leia Doesn't Remember Ben Is Obi-Wan
Throughout her encounters with Kenobi in the series, he refers to himself as Ben. The most straightforward explanation would be that Leia knows the person who rescued her is Ben, and never connected the dots that Ben is actually Obi-Wan.
Obi-Wan never did, but Yoda originally had wanted to train Leia instead of Luke. In the book “Star Wars: From a Certain Point of View” there is a short story from Yoda's perspective on Degobah. He was thinking to himself how he could not wait to train Leia, as she had all the qualities of a good Jedi, unlike Luke.
First, she admitted that she didn't really care about the Force. Thus, if she went with Luke, she would be doing it for the sake of being with Luke, not because she was following the will of the Force. However, more importantly, Leia refused to be a Jedi because Darth Vader's power had scared her.
While the kiss was simply intended to make Han Solo jealous, the full implications of the encounter became even more problematic when Leia is revealed to be Luke's twin sister during Return of the Jedi.
Solo: A Star Wars Story - an anthology film presenting Han Solo's backstory, starring Alden Ehrenreich as the young scoundrel - revealed he grew up as a street urchin on Corellia, and fell in love with a girl named Qi'ra.
Canon comics
Han is a main character in the 2015 Star Wars comic series. Issue #6 introduces Sana Starros as Han Solo's wife, although a few issues later she is revealed to have only married him as part of a plan to scam a crime lord's gambling den.