The 'Cake' actress is renowned for her radiant skin and beautiful hair, but says the thing that's helped her keep her looks best is the mantra meditation technique pioneered by Maharishi Mahesh Yogi in the 50s.
When asked what the number one thing which has kept her looking so amazing is, Jennifer replied: "I'd say a little over a year ago I started doing TM [transcendental meditation] and that's really changed everything. Starting your day off with that and ending with that is pretty powerful. Twenty minutes, you just notice the difference. When I get lazy and don't get it in, I can feel a difference. I do it first thing when I wake up."
As well as her daily meditation sessions, Jennifer, 45, also sticks to a strict beauty regime, and she won't break her routine for anyone.
She added to the new issue of People magazine: "I bring everything [on vacation]. The best I can do of course. You have to. Especially with travelling, you have to keep your skin hydrated and moisturised. The regime is pretty simple too. You can't overcomplicate."
Jennifer has also got her fiancé Justin Theroux involved in her beauty regime and has revealed the pair have "Sunday night facials" together.
The 'Horrible Bosses 2' star explained: "We've had a Sunday night facial together. Many times. Its very romantic. He's good to his skin. He doesn't do the dermaroller, but he would if I showed it to him. I have to protect my product!"