The parents of a 14-year-old girl who took her own life after being relentlessly bullied online have invited the social media trolls to attend her funeral, to witness the devastation they have caused.

Amy Everett, known as Dolly by her family, was the face of Akubra Hats as a child.

The teenager from Katherine in the Northern Territory took her own life on January 3 after suffering years of online abuse.

Her father, Tick Everett, took to Facebook to describe his grief, saying his beloved daughter felt she had no other option.

"I know for some suicide is considered cowardly but I guarantee those people wouldn't have half the strength that my precious little angel had," he wrote.

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Amy 'Dolly' Everett was the face of Akubra Hats as a child. Photo: Facebook/AkubraHats

"However, unfortunately, Dolly will never know the great pain and emptiness left behind.

"If we can help other precious lives from being lost and the suffering of so many, then Doll's life will not be wasted."

He also gave his daughter’s bullies a chance to see the repercussions of their actions by inviting them to Dolly’s funeral.

“If by some chance the people who thought this was a joke and made themselves feel superior by the constant bullying and harassment see this post, please come to our service and witness the complete devastation you have created.”

Akubra Hats has also posted a moving tribute, which has been shared more than 11,000 times, honouring the girl who was the face of their past Christmas advertisements.

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Left: Dolly (far right) pictured with her family. Right: Dolly at her home in Katherine. Source: Facebook/Tick Everett

"To think that anyone could feel so overwhelmed and that this was their only option is unfathomable," the company wrote.

"Bullying of any type is unacceptable. It is up to us to stand up when we see any kind of bullying behaviour.

"Our hearts go out to her family and friends."

A public memorial service will be held on Friday at the Casuarina Street Primary School in Katherine East.

Friends and family are asked to wear blue, which was Dolly's favourite colour.

Anyone seeking support and information about suicide prevention can contact Lifeline on 13 11 14 or the Suicide Call Back Service 1300 659 467.