He has battled cancer since a cancerous tumour was discovered in the back of his brain in 2007.
He received radiation for more than six weeks, chemotherapy for another 12 months and has spent months in and out of Starship and Ronald McDonald House.
He also spent months after his cancer treatment learning to walk and talk again.
Joshua's dad, Mike Coleman, said it was remarkable his son was going to be walking out on to the court tonight.
"It's been a very long and very hard journey and it hasn't stopped. It's ongoing and it doesn't get any easier ... being able to do something like this means a lot, it's something that puts a smile on his face."
While Joshua is now clear of cancer he still has to get yearly MRI scans and take growth medication daily.
His mother Donna Coleman said Starship staff were still in touch offering their support.
"Without Starship's or Ronald McDonald House's help, I don't think we could have done it."
