Jennifer Aniston has been crowned the World's Most Beautiful Woman of 2016 by PEOPLE magazine.

Speaking in this week's magazine, on which she graces the front cover, she said of her win: "It's funny, it's a really quick transition from not a care and now all of a sudden, we've got to really be mindful of what we put inside our bodies.

"And how we sleep and take care of ourselves. You can get away with a lot in your 20s."

This isn't the first time the former 'Friends' star has nabbed the title as she also secured it 12 years ago when she 35.

Aniston - who is married to actor Justin Theroux - managed to claw her way to the top in this year's competition after learning to take better care of herself over the years.

And Aniston - who has a portfolio of hit films as well as her 10-year stint playing Rachel Green - believes she owes her win to her old agent, who once told her she didn't get a role in a film because she was too "chubby."

She explained: "I was like, 'What?!' But my diet was terrible. Milkshakes and French fries with gravy [laughs]. It was a good thing to start paying attention."