It seems like just yesterday we were watching Amber Portwood give birth to daughter Leah Shirley on 16 and Pregnant, but nowdays, the nine-year-old is looking more grown up than ever! The Teen Mom OG star's little girl made an appearance on step-mom Kristina Shirley's Instagram recently, and Leah looks just like her mama. Check out the video above to see the sweet photo.

Leah is already the best big sister to half-sister Emilee Shirley, and she officially welcomed her new little brother, James, earlier in May. "Big sis and little James! She was so excited to meet her little brother," Amber captioned an adorable pic of Leah holding the newborn.

Amber shares Leah with ex Gary Shirley, and the two are luckily on good terms as of late. In fact, after welcoming her second child — her first with husband Andrew Glennon — Gary even took to Twitter to share his congratulations. "Thanks to Amber Portwood and Andrew for sharing their little bundle of joy with Kristina and I. We got to hold the little guy. BTW he is so stinky cute and again congrats," he wrote. "We have our ups and down. I think the ups are more frequent than the downs. But the point is we are trying, and honestly, I want the best for them and Leah deserves both parents working together. Thanks for all the great support." So sweet!

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