(Fourth original Teen Mom, Farrah Abraham, isn't returning.)
It was announced today that the trio will return for a new series of Teen Mom next year, giving fans the chance to see what they've all been up to since they last appeared on our screens.
And it's a LOT!
Catelynn announced this month that she's expecting a baby with long-time boyfriend Tyler Baltierra. Fans of Teen Mom will know the couple made the difficult decision to give their first child up for adoption during the show, believing it to be in the baby's best interests.
Now, they are looking forward to welcoming a second child.
Catelynn tweeted today: "It's official we are coming back!! @AmberLPortwood @MaciBookoutMTV @TylerBaltierra looking forward to showing you what we have been doing!"
Maci – mum to son Bentley – is now at college studying and working as a social media marketing specialist, according to Us Weekly, which broke the reunion news. Viewers will get to see how her romance with boyfriend of two years, Taylor McKinney, is going.
Meanwhile, Amber is hoping to show fans she's matured and grown up from the last time she hit the headlines. She served time in jail after being arrested for a drug offence and other charges.
Now, she's written an autobiography and studying at college although she hasn't decided what she wants to focus on work-wise.
She's mum to daughter Leah.
Catelynn, Maci and Amber were first introduced to viewers back on MTV's 16 and Pregnant, before letting us into their lives once again on spinoff show Teen Mom.
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