When the world was first introduced to Bristol Palin she was barely out of high school and expecting her first child. In 2008, her mom Sarah Palin was named the vice-presidential nominee — and all eyes were on the political family.

Since her debut, Bristol, now 27 and a mother-of-three, has been at the center of plastic surgery rumors thanks to her changing looks. So, has the Alaska native gone under the knife? In 2011, Bristol opened up about the surgery she had done to correct her jaw.

"It's not plastic surgery," she told Us Weekly at the time. "Yes, It improved the way I look, but this surgery was necessary for medical reasons… so my jaw and teeth could properly realign… I don't obsess over my face."

bristol palin getty images, splash
Getty Images, Splash

Bristol in 2011 vs. 2015.

However, while it was not a cosmetic procedure per se, Bristol admits she does love how she looks post-surgery. "I am absolutely thrilled with the results," she added. "I look older, more mature, and don't have as much of a chubby little baby face!"

According to Miami plastic surgeon Dr. Tal Roudner, who has never treated Bristol, it appears weight loss might be the biggest factor when it comes to her transformation. "While she did admit to undergoing jaw surgery — which could have been for cosmetic reasons or functional reasons, for example, to correct an overbite — you can tell her lower lip looks somewhat fuller, which could be a result of fillers or upturn of the lip due to jaw surgery," he told Life & Style exclusively. "Whatever the reason, Bristol looks charming and happy."

We think Bristol's youthful appearance is most likely due to genetics — and her 53-year-old mother is proof that the Palins age gracefully. "I have said this to just about everyone I speak to… the Governor’s skin is the most beautiful skin I have ever worked with," Sarah's makeup artist Amy Strozzi told the HuffPost in 2009. "Of course, makeup always helps to create an even canvas, but the condition of her skin was flawless. I attribute it to the clean Alaskan air, lots of fresh fish and protein, and a good fitness regime." Like mother, like daughter.