• Ashton Kutcher opens up about his serious illness
  • He suffered from a rare autoimmune disease
  • The Hollywood star was very sick

We know Ashton Kutcher (44) as a funny and entertaining Hollywood beau from films like No Strings Attached and What Happens In Vegas. But what the actor never talks about is a serious illness he once suffered from.

Ashton Kutcher: He suffered from this rare disease

Now, in a preview of the survival show Running Wild with Bear Grylls: The Challenge, Ashton Kutcher revealed he had an autoimmune disease. This was a rare form of vasculitis, a disease that can lead to inflamed blood vessels.

"Like two years ago, I had this weird, super-rare form of vasculitis. Knocked out my vision, knocked out my hearing, knocked out like all my equilibrium. It took me like a year to like build it all back up," said Ashton.

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Ashton Kutcher: "I'm lucky to be alive"

How bad the time must have been for Ashton Kutcher is shown by these words: "I don't know if I'm ever gonna be able to see again. I don't know if I'm gonna be able to hear again, I don't know if I'm going to be able to walk again. I'm lucky to be alive," he revealed.

Watch the video above to learn more.