There was a time when it looked as though Mackenzie McKee would replace Farrah Abraham on Teen Mom OG.
Ultimately, the show's producers decided to go in a different direction, casting Bristol Palin and Cheyenne Floyd instead.
But fan interest in Mackenzie and her family remains at an all-time high.
Fortunately, we've been able to keep up on the latest developments with the McKees thanks to Mackenzie's social media posts and a recent Where Are They Now? Teen Mom special that checked in on the family.
As you may recall, Mackenzie's mother, Angie Douthit, suffers from stage 4 cancer.
Both Angie and Mackenzie have made the courageous decision to offer regular updates during this intensely difficult time in hopes that they might serve as an inspiration to others who are struggling.
And this week, Angie was finally able to share some good news with fans in the form of the video below.
In the clip, Douthit triumphantly rings a bell to celebrate the end of her intravenous chemo treatments.
"I got to ring the bell!" Angie wrote on Instagram.
"I wore my Wonder Woman shirt because I wore it to my first chemo treatment and thought it only fitting to wear it to my last IV chemo treatment."
She went on to demonstrate the humor and optimism that have endeared her to so many Teen Mom fans over the years:
"(Yes, I wore it to school all day too!) I was the first one to ring the new bell that wasn’t even mounted to the wall yet. Ringing the bell signifies that I’m finished with all my rounds of chemo.
"Although I’m still taking a chemo pill everyday, I’m through with IV chemo."
Proving once again that she's an almost impossibly selfless person, Douthit stated that one of her favorite parts of completing this stage of treatment was seeing how happy it made her husband:
"Brad and I celebrated last night with dinner at his favorite restaurant," she wrote.
"Watching him be so relaxed and celebrating brought joy to my heart. God has been so good.
"I haven’t been very sick from the chemo, I’m still working, and I still have my eyelashes lol," Angie continued.
"It was 18 weeks of being carried by the love of God... I have no control over my future," she added.
"None of us do. But, we can relax and be calm knowing our big God is in control because he loves us so much!"
The post is a far cry from the one Angie wrote back in June, in which she opened up about how much she was dreading the chemotherapy process.
"This morning we leave at 7:30 to begin another new journey," Douthit wrote at the time.
"IV chemo... As I’ve shared before, I dread chemo. However, God revealed to me that if I never had to go through IV chemo I would never fully understand cancer."
Sadly, Angie is not out of the woods yet, but the thoughts and prayers of millions are with her as she completes her recovery.
Here's hoping for another upbeat update in the very near future.