Stars from Jennifer Aniston or Victoria Beckham are renowned for their radiant complexions, so when they share their skincare and anti-ageing secrets, we listen.
We've rounded-up some of the best advice from the A-list for glowing skin - click through for the full gallery...
The former Friends star quipped that her Greek heritage is key to her radiant complexion, however she also follows a few simple tricks to keep signs of ageing at bay. "But it's also just water, drinking a lot of water, using really nice good products for your face," she told beauty guru Bobbi Brown for Yahoo! Beauty. "Don't over-product, that's the other thing. Getting proper sleep is always important."
"I swear by Dr. Lancer products. He's a dermatologist that I met in Los Angeles," the style icon told Elle. "I started going to him for oxygen facials, and I haven't looked back. I don't really use products other than his. I keep it quite simple with a really good polish, then an exfoliating cleanse, then I use a nourish cream, which is a really beautiful moisturizer. I just do that twice a day, and I think it's very important to drink lots of water and get as much sleep as you can."
For the singer, sleep is key to any beauty regime. "I try to get eight hours a night," she told Health. "I think what works best is sleep, water – and a good cleanser."
"I say this to every young person I know. Stay out of the sun!" she told InStyle. "I have very fair skin and it would have been super damaged. I always wear sunscreen and I walk on the shady side of the street."
The Frida star revealed that a skincare routine shouldn't focus just on the face. "Hands. I use what I use on my face on my hands. I take the leftovers [after applying creams to my face] and put them on my hands, neck, décolletage, shoulders, and the back of my neck before I go to sleep," she told Vogue.
The actress revealed she believes it's important not to start an anti-ageing routine too early on. "I haven't had a need yet for technical creams so I keep it very simple and just cleanse, tone and moisturise," she told Marie Claire. "Women in their twenties are turning to anti-ageing products too soon instead of getting help from aestheticians."
"I think the most important thing is, if you're happy in your life and you're doing work that you like, that comes across," the supermodel told Into the Gloss. "As well as if you've taken care of yourself over the years, that shows. Like I was never a party girl, and I don't smoke, and I eat right, and I exercise, and I drink water, I try to get enough sleep, which is usually easier now that my kids are older, except I have to stay up later on weekends to drive them home. True beauty is the energy you give out, and that comes through being happy."
"I keep my skin clean, SPF'd, and I make sure to clean and moisturise at night. That's often as much time as I have. But I love being in the sun. I feel so lucky to live in Southern California and to wake up to a beautiful, sunny day almost every single day," she told Glamour. "As far as sun protection goes, it has to be a part of your daily routine, just like brushing your teeth."
Renowned for promoting positive body image, Cameron urged her Instagram followers to embrace and celebrate the ageing process. "I'm so excited to continue the conversation because learning that you can age well, will actually help you age better," she wrote alongside a no make-up selfie. "If you understand how your body works then you can take action to help keep it in the best possible condition so it can carry you through a long and beautiful life. Read my full post at www.OurBodyBook.com @thebodybook #linkinprofile #longevitybook #knowledgeispower #everyoneages."
"Your skin tells all your secrets," Gwyneth told Refinery29, before adding that you should have "good nutrition, exercise and hydration."