Lake Macquarie's Ruby Payne will have a charity event held in her honour on Saturday, following her double lung transplant last year.
Windale Rugby League Club will host Ruby's Day, with junior and senior teams wearing special jerseys promoting the cause of DonateLife.
Ruby, 12, said the day would be about "the community and family and friends coming together to support the incredible charity that means so much to me and my family".
"It's important to raise awareness around organ and tissue donation, as people don't realise that one life can save up to seven lives," Ruby said.
"Signing up to be an organ donor is a simple process that takes less than a minute."
Ruby's dad Robbie Payne is Windale's coach.
The club's junior and senior committees wanted to do something for Ruby, which led to the charity day.
Robbie will be forever grateful to the donor who saved Ruby's life.
"If it wasn't for DonateLife and organ donation, I wouldn't have my daughter," he said.
Ruby's Day coincides with DonateLife Week, an initiative of the federal government's Organ and Tissue Authority.
The organisation's CEO Lucinda Barry said organ donation "can be the difference between life and death".
"We all have the chance at the end of our life to save a life," Ms Barry said.
"That's why we are asking everyone in the community to take a minute and register as organ and tissue donors."
DonateForLife will set up a marquee at Windale's home ground for the charity day.
"We'll have face painting, snow cones, cake stalls, a raffle, merchandise tent and about 50 prizes," Robbie said.
"We have a special charity strip that the whole club will wear on the day.
"We'll auction the men's jumpers at the end of the day and hopefully get $15,000 to $20,000 for charity."
Ruby was diagnosed with pulmonary hypertension at age eight.
It's a rare condition that causes high blood pressure in the arteries of the lungs.
"The lung arteries get blocked and that affects the heart," Robbie said.
"She was on a series of medications for about four years."
Doctors tried an intravenous pump in her heart.
"She had to wear a little pump on her side every day," he said.
"That didn't work and her heart and lungs began to fail. The last hope was a lung transplant."
Ruby spent five months in Melbourne for the lung transplant, with her dad and mum Mel Streeter.
"In September we got rushed to Sydney, then to Melbourne. We were there from September to February," Robbie said.
Ruby, who used to play netball, is doing well now.
"They reckon after 12 months, maybe 2025, she could play some sort of sport," Robbie said.
Register as an organ and tissue donor at donatelife.gov.au, or through the Medicare app.
