Luke Skywalker (Mark Hamill) was seen at the end of “Star Wars: The Force Awakens” when Rey (Daisy Ridley) came on Ahch-To to give his lost lightsaber. As the Jedi Knight was in self-imposed exile, it seemed like he has no intention to return to be part of the Resistance again.

In an interview with Entertainment Weekly, the 65-year-old iconic actor talked about what pushed him to leave everything behind and live alone on the planet of rocky islands. From the looks of it, there is a heart-wrenching reason behind it.

Kylo’s betrayal that affects Luke

Mark Hamill revealed that it was Kylo Ren’s (Adam Driver) betrayal that made Luke Skywalker decided to live on another planet and leave everything behind him.

The Jedi Knight looked at his nephew, the son of his sister Leia Organa (Carrie Fisher) and his friend Han Solo (Harrison Ford), as his successor but things got worst. The former Ben Solo turned to the Dark Side and killed all of his uncle’s students at Luke's Jedi Academy. After that, he changed his name and called himself Kylo Ren.

As Luke was looking forward to being Obi-Wan Kenobi to the younger Solo, it seemed like he turned to be more like Anakin Skywalker. He felt like he made a major mistake for thinking that he could be the “chosen one” that will give balance to the Force.

“So he invested everything he had in Kylo, much like Obi-Wan did with my character," the actor told EW.

The guilt Luke is taking and a confusing backstory

With that, Luke Skywalker felt like he was responsible for everything Kylo Ren did, from his betrayal to its tragic consequences.

Thus, it is the obstacle that keeping him to join the Light Side’s force and take his place in the Jedi hierarchy again.

The Jedi master thinks that it is his fault that he didn’t foresee the darkness resting on his nephew’s personality until he did the unexpected. When Luke said that “It's time for the Jedi to end,” it is just barely the beginning of his return.

While reading the script of “Star Wars: The Last Jedi,” Mark Hamill admitted that his “jaw dropped” and his character’s change of attitude gave him a little hard time.

“What would make someone that alienated from his original convictions?” he said.

He even hinted that there is an enormous amount of backstory that one could ever imagine that won’t allow him to portray his role perfectly if he can’t figure out what it is. "Believe me, you're going to see lots of conflict in ‘The Last Jedi,’” he teased.