At the end of Star Wars Episode VIII: The Last Jedi,

Luke Skywalker becomes one with the Force.

He looks quite exhausted after the encounter with Kylo Ren.

But what exactly killed him?

  • 2
    Are you sure he's dead?
    – Möoz
    Mar 6, 2018 at 21:38
  • 3
    At lease Leia and Rey sense it through the force. And we observe him disappear, with only robes remaining.
    – TimSparrow
    Mar 6, 2018 at 21:50
  • 22
    I think it was the goons from Toshe Station. Something about an unpaid bill for some power converters. Mar 6, 2018 at 21:58
  • 2
    @TimSparrow "Ha! Elaborate Force death hoax!"
    – xDaizu
    Mar 7, 2018 at 11:20
  • 13
    What killed him? Some meddling Disney executive. Mar 7, 2018 at 15:20

3 Answers 3


Luke over-exerted himself.

This Jedi had not moved since dawn. During that time, the mountain had quaked. A cliff had crumbled. The twin suns had begun to set. The moon had gone on the rise.

It had taken all his strength to do what he had done. The salt lines of tears on his face showed the incredible strain. Now that it was done, he could enjoy a few last breaths from the island that had been his home.

Last Jedi: Junior Novelisation

His efforts drained his "essence". Ben Kenobi then encouraged him to become one with the Force.

On the ledge overlooking the sea, Luke Skywalker floated a few centimeters above the stone. Pebbles hovered around him. His eyes were closed and his legs crossed. His face was strained, and beneath his gray beard the tendons of his neck stood out. Tears streamed down his face as he poured his strength, his very essence, into the Force.

Behind him the peak shuddered, shedding dust and chunks of debris.


Luke heard the wail of the wind and the cries of the birds. He heard his own faltering breaths as he struggled to get up, and the rhythmic thumping of his heart in his chest.

And he heard a familiar voice. Maybe it was real, or perhaps it was just in his memory.

Let go, Luke.

He did and his body faded away, leaving the ledge empty. In the spot where he had been, the Force rippled and shivered. But a moment later this disturbance was lost amid countless other currents of an autumn evening on the island, and the Force continued as it always had, luminous and vast and eternal.

The Last Jedi: Official Novelisation

The film's Movie Storybook also offers this version of events, suggesting that he's taken energy from the Force as well as giving his own strength.

Back on Ahch-To, Luke faded away on the meditation ledge, becoming one with the Force.

It had taken everything he had to project so much of himself onto Crait. Drawing that much power directly from the Force had consequences. But Luke was happy to pay them. His final act had saved Leia, Rey, and the Resistance.

The Jedi would continue, even though Luke would be gone.

  • 5
    Goose bumps...I couldn't bring myself to watch the movie again, but that voice wasn't in the movie, was it? Mar 7, 2018 at 18:55
  • 10
    So, basically, hearing Obi Wan's voice was the last drop for Luke. There's only so much a man can take...
    – void_ptr
    Mar 7, 2018 at 19:37
  • 4
    As Mr Hamill helped highlight yesterday on twitter, the film-makers forgot to leave his hand behind (I can't wait to check this when the dvd is out) twitter.com/HamillHimself/status/971199060014084096 Mar 8, 2018 at 3:30
  • 8
    They also forgot to leave behind the ceramic filling from a root canal he'd had once on Dagobah from a dodgy "dentist" acquaintance of Yoda's (scene cut from the script last minute). You know... as long as we're splitting hairs... Mar 8, 2018 at 5:07
  • 1
    @JoelCoehoorn, that was addressed here, some Jedi take their mechanical parts and other belongings as they become one with the force
    – TimSparrow
    Mar 8, 2018 at 19:57

He metamorphosed into a Force-Ghost

This scene was the climax of Luke's journey. He has always wanted to be at one with the Force, to avoid conflict and achieve peace.

You'll remember in the little-known movie Star Wars Episode IV: A New Hope where Old Ben (Obi-wan) Kenobi did the same thing when faced with Darth Vader:

Old Ben: If you strike me down, I shall become more powerful than you can possibly imagine

*Gets struck down*
*Turns into air*

Luke has reached the final stage of his journey, he has ushered in a new wave of Jedi (whether he likes it or no), has defended and protected his most precious: his twin sister, Leia and the Rebellion; and has finally brought hope to those who need it most.

He then joins the ranks of Obi-wan Kenobi, Grand Master Yoda, Anakin Skywalker, and Qui-Gon Jinn and has finally become a Force Ghost.

But what did kill him?

I wouldn't say that his encounter with Kylo Ren and his super-force-projection was what actually killed him. Yes, it drained him, but he did recover and prop himself up onto the rock seat again.

From what we can tell about Force Ghostism, is that it seems to be a voluntary act. Those who have become Force Ghosts seem to give themselves in to their final state. Luke completed his encounter with Kylo Ren and his successful mission on Crait, propped himself up onto the seat, mustered the remaining reserves of his energy and let himself go.

  • 7
    Why do you think Force Ghosting is a voluntary thing? Obi-wan was struck down by a saber, Yoda died of old age, Qui-Gon took a saber to the gut, and Anakin/Vader suffered massive amounts of force lightening. No one that we have seen was in perfect health and went, "I'm gonna be a ghost!"
    – MivaScott
    Mar 6, 2018 at 22:56
  • 12
    @MivaScott Obi-Wan let Vader kill him, willingly. Anakin died at peace after turning back from the dark side. Yodas task was done, he could let go. Only Qui-Gon was actually killed by someone else.
    – Polygnome
    Mar 6, 2018 at 23:18
  • 7
    I just rewatched Episode 4, I'm convinced that Obi-Wan transformed into a force ghost before Vader's lightsaber killed him. You have to watch frame-by-frame, but if you do, you'll see that Obi-Wan's cloak starts to fall to the floor before Vader's strike hits him. See this question: scifi.stackexchange.com/questions/153792/…
    – LevenTrek
    Mar 7, 2018 at 1:26
  • 9
    @LevenTrek given the relatively low quality of the entire fight choreography, I would consider the early-falling cloak a movie mistake rather than an intentional hint. If it were meant to be seen by the audience, it would not require frame-by-frame watching.
    – Tom
    Mar 7, 2018 at 6:25
  • 6
    @Tom I respectfully disagree. The lightsaber strike goes "through" Obi-Wan's cloak, so it definitely wasn't one of their "make a real sword glow" effects. Instead, they would have created this particular effect in post-production, which means they chose exactly when to make the saber disappear. If they had meant for the saber to strike before the cloak fell, they could have easily made it so.
    – LevenTrek
    Mar 7, 2018 at 6:35

Earlier in the movie, when Kylo has a telepathic conversation with Rey, he first thinks it might be a Force projection, but he dismisses that idea because the effort across galactic distances would kill her.

This seems to be the technique Luke used, and it is probably the thing that killed him.

  • 4
    In that telepathic conversation, Kylo doesn't necessarily reference "Force Projections", he just says "You're not doing this, the effort would kill you". It seems like he recognizes the effect as telepathic communication but also knows it takes extreme power, which Rey doesn't have yet.
    – LevenTrek
    Mar 7, 2018 at 1:19
  • 3
    Also worth noting. This answer may explain what Kylo Ren thinks would have killed Luke. That does not mean Kylo is correct. Clearly, Kylo still has much to learn in the ways of the force.
    – Scott
    Mar 7, 2018 at 3:08
  • 2
    @LevenTrek I think rather it's that Rey doesn't have the control yet. Luke and others reference Rey's "raw power" several times throughout Eps VII and VIII. It's the exertion and the refined control that help you avoid killing yourself when doing something powerful.
    – TylerH
    Mar 7, 2018 at 14:43

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