'Fixer Upper' star Chip Gaines shaved his entire head for charity

Chip Gaines' long locks are a thing of the past.

The "Fixer Upper" star shaved off his famously grown-out red hair this week, going fully bald in honor of St. Jude Children's Research Hospital. He announced the most on Instagram last week and pledged that "the more money we raise over the next FOUR days, the shorter my hair goes. That's a promise."

SEE ALSO: Why are Chip and Jo Gaines really leaving HGTV? Report claims they're after a bigger deal

"Maybe if you really exceed my expectations...I'll buzz it all off," Gaines finished.

Clearly, the 42-year-old HGTV personality's expectations were exceeded, as a photo shared on Instagram by wife and fellow "Fixer Upper" star Joanna Gaines shows what appears to be Chip rocking a completely shaven head. 

See more photos of Chip and Joanna Gaines:

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Chip Gaines and Joanna Gaines on Instagram
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Chip Gaines and Joanna Gaines on Instagram
This guy right here... I get to live life with him. I get to hear his thoughts and benefit from his wisdom and encouragement on a daily basis. The reason I am who I am today is because Chip pushed me to go for it. People think of him as a jokester, and he is. It’s a huge part of why I fell in love with him in the first place. But he is so much more than that. He is the ultimate cheerleader, coach and dream maker. I am so thrilled that his book releases today mostly because I believe it holds truth that the world is in desperate need of. I am always proud to be Chip’s wife but today more than ever. I know this book was a true labor of love. Well done, Chip Carter Gaines! #CapitalGaines @chipgaines
What a day!! #CapitalGaines #booktournyc @chipgaines
What a night ✨✨ #silobration
Today we got to take a walk down memory lane with the crew... remember this house?! This was the first home we shot for our #fixerupper pilot episode five years ago! My how time flies 📺
Thank you all for watching, caring and cheering us on these past few years. We are overwhelmed by your support and your kindness. You have become a part of our story forever. Season 5 of Fixer Upper is scheduled to start airing in November and we really have saved the best for last! (To see the full announcement about our finale season, visit magnoliamarket.com/blog)
Congratulations to my Chipstarter winners! Some may say 6 out of 2,700 is lucky.. around here we call that a miracle and I’m honored to be a small part of your story moving forward. Thank you to everyone who took the time to share your dream with me. Capital Gaines is officially out tomorrow, so go pick up a copy and keep working towards that dream of yours. #CapitalGaines (link to winning videos in my profile)
Jo has poured her heart and soul into this new line, Hearth & Hand with Magnolia available at Target November 5th. We're here with Bullseye at Target HQ today announcing it to all of their team members! I wrote down all my thoughts about this project on the blog—go check it out. #HearthAndHand (Link in profile)
@U2 tonight - I have a feeling this is going to be a good one. #U2TheJoshuaTree2017
Another #fixerupper reveal down today for Season five! @hgtv #season5iscoming
Was trying to make a video for a friend this morning with @chippergaines .... his tutorial was 👍🏽 #🤡
Once a design assistant, always a design assistant. I've got the best job in the world! #fixerupper #season5iscoming
I've got you babe! #season5iscoming #fixerupper 📹: @huntybuns
WHAT!?! 📸@brockwayne
Out on a hot date last night! @joannagaines loves to drive, so I usually let her.. but road trips, those are mine!
"We were together. I forget the rest." - Walt Whitman & @jimmydon522 Happy Valentine's Day @joannagaines
He competes with the view. Man bun, tube socks, adult onesie and all... He still looks mighty fine to me❤️#workcation #bookcamp
That was a fun date night ❤️@chippergaines @u2
Today started off with me holding one of our new baby goats and counting chickens... I knew it was going to be a good one. THANK YOU for all the kind words and birthday wishes ❤❤❤
Watch an all new #fixerupper tonight!! 9/8c @hgtv
Happpppy New Year!!! 2017!! #adultonesies @chippergaines
Tonight is an all new special episode! It's the season four Clip show- full of out takes, bloopers and behind the scenes footage. You won't want to miss! 9/8c @hgtv
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"We are leaving Memphis changed," Joanna wrote on Instagram. "Kiddos of @stjude we go with your faces on our minds and your stories in our hearts. Thank you for letting us be a part of your home at Target House. We are cheering you on every step of the way."

The photo shows Chip surrounded by a dozen or so patients from St. Jude rubbing his newly shaved head. As is usually the case, he has a massive smile on his face.

The development comes just over a week after the couple wrapped their final episode of "Fixer Upper." The couple shocked fans when they announced back in September that the upcoming fifth season of their beloved HGTV show would be their last.

10 things you didn't know about Chip and Joanna Gaines:

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10 facts you didn't know about 'Fixer Upper' stars Chip and Joanna Gaines
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10 facts you didn't know about 'Fixer Upper' stars Chip and Joanna Gaines

They both attended Baylor University, but the two actually didn't meet in school! 

Jo's father owned tire shop and he saw a picture of her hanging behind the store counter. He convinced himself he was gonna marry Jo even before they had actually met.

(Photo: Getty)

Jo was a communications major at Baylor University and she had dreams of becoming a broadcast journalist. 

Before getting her big break on "Fixer Upper," she actually appeared in commercials for her father's tire shop. Chip eventually used the commercial in a pick-up line when they first met ... and the rest is history!

As for Chip, he had other aspirations, like being a baseball player or politician. 

If it ain't broke, don't fix it! Chip stays loyal to his favorite clothing brands. In fact, he's worn the same style of jeans and boots since they got married in 2003 -- Gap 1969 standard-fit jeans and Ariat boots.

His ladylove, on the other hand, prefers Citizen low-rise skinny jeans and Frye boots. 

As you can probably tell from all their renovations on "Fixer Upper," Jo loves to decorate with pretty blooms and greenery. Her favorite flower? Pink antique roses.
Chip and Jo's Pinterest-perfect farmhouse sits on 40 acres of land, which is just big enough for their 60 animals to roam around in.
Jo knew the value of hard work even when she was very young. Her first job? At an all-you-can-eat buffet. To this day, she says still appreciates buffet lines, but her husband has different thoughts on the matter.

The couple's first fixer-upper home? Their very own abode that they started working on soon after their honeymoon. The 1,700-square-foot Victorian home they currently live in is the ninth home they've lived in and renovated together.

The name "Magnolia," which they named all their businesses after (Magnolia Homes, Magnolia Market, Magnolia Farms) holds a special meaning. When they first started dating, Chip would bring blooms from Magnolia trees to Jo.

The Gaines family doesn't own a television! They go over to a friend's house every week to watch their own "Fixer Upper" episodes or in their hotel room during trips.

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