She is one of Hollywood's most beloved actresses.

And Julia Roberts has revealed the 'simple' ways she has maintained her youthful appearance throughout her decades-long career.

The 54-year-old also spoke with Stellar magazine on Sunday about avoiding the effects of narcissism of social media.

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Opening up: Julia Roberts has revealed the 'simple' ways she has maintained her youthful appearance throughout her decades-long career in an interview with Stellar on Sunday

In regards to her beauty routine, the mother-of-three acknowledged she sticks to the basics.

She offered 'water is everything' when it comes to her skincare regimen.

'And sleep, which is impossible for most mums, of course. And to find that sense of joy. When I'm grumpy, my eyes are super puffy,' she added. 

Simple: In regards to her beauty routine, the mother of three acknowledged she sticks to the basics

Hydrated: She offered 'water is everything' when it comes to her skincare regimen

'And sleep, which is impossible for most mums, of course. And to find that sense of joy. When I'm grumpy, my eyes are super puffy,' she added

The veteran star, who doesn't indulge in social media, said she has an aversion to the 'narcissistic practice of the selfie.'

'We have become a culture that's so self-examining and so self-promoting that it just becomes too overwhelming,' she described.

'Maybe less self-examination is the key to being gorgeous,' she continued. 

Humble: The veteran star, who doesn't indulge in social media, said she has an aversion to the 'narcissistic practice of the selfie'

'We have become a culture that's so self-examining and so self-promoting that it just becomes too overwhelming,' she described

Known for the diversity of her high-profile roles, her latest is as the supportive mother of August Pullman in Wonder, due out in cinemas on Thursday.

The film is based on the 2012 book of the same name by R.J. Palacio and centered on 'Auggie' as the main character, who suffers from facial malformations.

The actress said the book was 'the greatest thing I have ever read' and immediately expressed interest in playing the role of doting mother Isabel Pullman.

'Maybe less self-examination is the key to being gorgeous,' she continued