Legendary country musician Glen Campbell's battle with Alzheimer's disease is poignantly captured in the new documentary, "Glen Campbell: I'll Be Me," in theaters on Oct. 24.

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His wife, Kim Campbell, told Gretchen Carlson on "The Real Story" today that the film follows her husband during his "Goodbye Tour," an epic 151-date farewell tour when he could still speak, sing and perform.

Now, the multiple-time Grammy Award winner can barely communicate, although he has maintained his sense of God and gratitude, according to his wife.

"I think it's important to know that even in stage 6 Alzheimer's, he has an awareness of God. He's a spiritual being," she said.

"He can communicate in the universal language of love, laughter, smiles, hugs ... but he doesn't understand a word I say to him."

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The documentary not only invites viewers into Campbell's life and struggle, it raises awareness about the devastating disease.

Carlson noted that in 2013 15.5 million family and friends provided 17.7 billion hours of unpaid care of patients suffering from Alzheimer's and other forms of dementia - valued at $220 billion.

For anyone who has a loved one with the disease, Kim Campbell said reach out to family and friends and ask for help.

Watch the clip above and be sure to catch "Glen Campbell: I'll Be Me" in theaters starting on Oct. 24.

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