A six-year-old girl dubbed the 'most beautiful in the world' has received creepy messages from men on her Instagram page.

Some comments on little Anastasia Knyazeva's profile read ‘perfect’ while one asked the child to grow her fringe out so she can look older, according to Yahoo .

Others made disgusting sexual remarks.

Anastasia, who has amassed an army of half a million followers, shot to fame by starring in high-profile advertising campaigns and her Instagram page receives thousands of likes and comments every day, reports the Mirror.

But critics have accused her mum, who has run the page since Anastasia was four, of ‘inviting online predators’ by posting posed images of her daughter.

One social media user wrote: ‘In this day and age we need to protect children.

‘You are inviting online predators into her life and setting her up to place her entire worth on her looks. I have a beautiful daughter and I would never parade her across the internet like this. You need to think about what you are doing.’

The blue-eyed Russian is being branded the new Thylane Blondeau , who became the youngest ever model to pose for Vogue at just 10.

Anastasia has starred in high-profile advertising campaigns and receives thousands of likes and comments on her Instagram every day.

Her mum Anna has been running the social media account since her daughter was just four years old.

The pretty schoolgirl, represented by President Kids Management, is now the face of huge Russian brand Chobi Kids.

And last year Anastasia was voted the face of Little Miss Aoki, a line from luxury couture fashion house Mischka Aoki.

Her photos regularly receive comments from adoring fans, who particularly comment on her huge blue eyes.