Of course, we're referring to her radiant skin which has been the envy of women for decades, and luckily for us all, the 45-year-old stunner is spilling her secret to her flawless appearance.
"I just take care of my skin, eat well, exercise," the InStyle cover girl, who has previously said that she's "not a fan" of Botox, tells the February issue of the mag. "And I love lasers and [other noninvasive treatments like] Thermage [radio frequency] and Ultherapy [ultrasound]. I also like a good microcurrent facial."
As for why Aniston has chosen not to go under the knife like many of her Hollywood counterparts?