Mackenzie McKee is now 24 years old.
Her mom, who is finally done with chemo as of only a few weeks ago, took to Facebook to wish her the happiest of birthdays.
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.
Poor Mackenzie McKee has been totally screwed over by MTV, getting considered and even filmed for Teen Mom OG and Teen Mom 2 but ultimately passed over for both.
Mackenzie is getting one consolation prize -- a Where Are They Now? special to show that unaired footage and catch fans up on her life.
As you've likely heard by now, two new faces will be joining the cast of Teen Mom OG this season.
Cheyenne Floyd and Bristol Palin will both be appearing as regulars when the show's eighth season premieres on October 1 -- and the reaction from fans has been mixed, at best.
If you're a Teen Mom OG fan, then you're probably already aware of all the major casting shakeups on the show in recent months.
The most high-profile development has been the addition of Bristol Palin to the cast, but the Alaskan mother of three isn't the only newcomer.
If you've been keeping up with Mackenzie McKee of Teen Mom 3 fame, then you know that things haven't been great for her recently.
And that's because things haven't been great for her mother, Angie Douthit.
Right on the heels of Kim Kardashian's ridiculous lollipop promotion, past, present, and perhaps future Teen Mom stars are coming out of the woodwork to promote "appetite-suppressing" lollipops.
No one's favorite reality stars, Farrah Abraham and Jenelle Evans, are getting slammed for plugging these weight-loss lollipops.
Mackenzie McKee has some seriously tragic news for us this weekend.
Back in January, as you may recall, the Teen Mom 3 star announced that her mother, Angie Douthit, had been diagnosed with stage four brain and lung cancer.
It's still unclear if Mackenzie McKee will replace Farrah Abraham on Teen Mom OG, but MTV certainly seems to have taken an interest in McKee in recent months.
The former Teen Mom 3 star will be featured in a one-off special about her life that recently wrapped filming and is set to air next month.
