Chelsea Houska's Instagram

What Made Chelsea Houska Say Daughter Aubree Is 'Not A Little Baby Anymore’?

The 'Teen Mom 2' kiddo just reached an exciting milestone.

Chelsea Houska better be ready to emulate a certain childhood fantasy figure, because her darling mini-me Aubree is down her very first pearly white! That's right, there's a brand-new teen mom tooth fairy in town.

The 23-year-old -- who will return with fresh "Teen Mom 2" episodes on July 9 -- posted a cute Instagram image of the five-year-old flashing her smile and giving a big ol' thumbs up for her mama.

Chelsea Houska's Instagram

"OH MY GOSH! Aubree lost her first tooth!" the esthetician captioned the photo above, which shows the cute-as-a-button, raspy-voiced kiddo loving (get it?) her latest milestone.

Looks like Aubree is more than ready for a special gift under her pillow, but it's a slightly bittersweet feeling for her loving parent. "She's officially not a little baby anymore!" Chels added, with a few sad-face emojis. Feels like only yesterday this precious peanut made her big debut on "16 and Pregnant" -- right, Chelsea?

Aubree isn't the only MTV kiddo shedding her itty-bitty chompers: Amber Portwood's gal Leah slightly resembled a Jack-o’-lantern while showing off her toothless grin, while Maci Bookout declared during the premiere episode of "Teen Mom OG" that she and the TF were going to be best friends because of Bentley's recent achievement.

Be sure to stay tuned to MTV News for more updates on the return of Chelsea and Aubree!