Chip Gaines just went completely bald!

Today, the Fixer Upper star shaved his head for a great cause and posted the results on social media. He's donating his hair to Children With Hair Loss and with the act raised over $300,000 for St. Jude Children's Research Hospital.

Chip Gaines shaves his head: See him bald!

Chip and his wife Joanna documented the head shave in a fun video and shared the results on Instagram. Watch Chip go from shoulder-length hair to fully bald below!

"I can't believe it! I'm gonna go bald," Chip says before sitting down for the cut. As he lets down his hair, Joanna jokes: "Chip, you've got great hair. I've never seen it this clean."

Chip also shares the story of when he met Bailey, a young boy going through cancer treatment at St. Jude hospital. And he'll be donating his hair to Children With Hair Loss, a non-profit that makes wigs for sick kids.

Then for the big reveal: Joanna asks if Chip is ready to see his "fixer upper," and he takes in the sight of his shaved head.

"What?! That is a bald head," Chip says. "I've got a lot of feelings, all the emotions." Joanna adds: "You did it for a great cause. I think it's so special."

Chip raised over $300,000 for St. Jude Children's Research Hospital, and he's encouraging everyone to "chip in" to the effort to end childhood cancer, which you can do here.

Good on Chip and Joanna for the touching act and generosity!

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