Aniston's long-serving hairstylist Chris McMillan, the brains behind 'The Rachel', described the rare beauty move as an "honour to be a part of" on Instagram.
"The hair is Jen's natural curl and waves," he confirmed in the caption, alongside a photograph of the former Friends star flexing her chameleon-like abilities at the premiere.
Thankfully, McMillan then went on to detail how to recreate the headline-worthy look at home so grab a pen.
Those with natural waves will be pleased to learn that all you need to do is leave your hair to air dry before touching up some pieces at the root with Dyson's Supersonic Blow Dryer.
In order to create a more polished curl, weave the ghd Classic Wave Wand through your hair before finishing with detangling spray (McMillan used a soon-to-be-released bottle by Drunk Elephant).
Add a smothering of leave-in conditioner for a shine Hollywood is sure to approve of.
Unsurprisingly, fans rushed to comment on the post with Instagram users hailing the hairstyle as one of Aniston's greatest beauty moments to date.
"Her hair is always gorgeous but this is one of my favourite hairstyles," one wrote.
A second agreed, adding: "I love her hair like that! Her natural waves are gorgeous."
"Love the natural look... so refreshing in the sea of high maintenance styles on Instagram!" a third commented.
We couldn't agree more.