What missing boy William Tyrrell would look like now

It's been three years and 23 days since William Tyrrell went missing on the New South Wales Mid North Coast.

His case remains open and the search for him is very much active.

William Tyrrell was just three when he disappeared from his grandmother's front yard.

According to Dr Susan Hayes, this is what William would look like now at six years old.

What William would look like now at six years old. Source: 7 News
What William would look like now at six years old. Source: 7 News

"You begin with looking at what are the growth patterns for children, especially boys, aged between three and six," Dr Hayes said.

Dr Hayes is a leading authority in facial anthropology and has constructed this latest computer-generated image of William exclusively for 7 News.

Dr Hayes, a leading facial anthropologist, constructed the computer-generated image. Source: 7 News
Dr Hayes, a leading facial anthropologist, constructed the computer-generated image. Source: 7 News

She says the changes are significant.

"The lower face followed by the the jaw, the nose width, the eye spacing a little bit," Dr Hayes says of the changes his face would show after three years.

It's hoped the image will help as thousands put their support behind the quest for answers.

William Tyrrell was three years old when he went missing. Source: AAP
William Tyrrell was three years old when he went missing. Source: AAP
William Tyrrell in his Spiderman suit. Source: NSW Police.
William Tyrrell in his Spiderman suit. Source: NSW Police.

A Facebook group dedicated to justice for children, Walking Warriors for Missing Children, has amassed 15,000 signatures supporting the push for an inquest, which they will take to the coroner next week.

"We feel if there is any hope for William at all, then the sooner better," a spokesperson for the group said.

"It just makes sense."

While it isn't unusual for coronial inquests to take place when there is still hope a missing person is alive, NSW Police say the investigation into William's disappearance is still very much ongoing.

Lead investigator Gary Jubelin said detectives are still following numerous lines of inquiry. Source: 7 News
Lead investigator Gary Jubelin said detectives are still following numerous lines of inquiry. Source: 7 News

Lead investigator Gary Jubelin told 7 News that inquests are mandatory in missing persons cases, but detectives are still following numerous lines of inquiry, and at this stage an inquest would be premature.

William at three (left) and what he could look like now. Source: 7 News
William at three (left) and what he could look like now. Source: 7 News

However, it is hoped this photo will help locate the missing boy.

Anyone with information is encouraged to call Crime Stoppers 1800 333 000 or use the Crime Stoppers online reporting page.