Early Sunday morning, Wilson is expected to wear the No.6 jersey when the Junior Wallabies meet defending champions France in the final of the under-20 world championships at Racecourse Stadium, Rosario.

Watching from the grandstand will be the 19-year-old's mother and father, Mandy and Cameron, and his older brothers, Sam and Will, who flew out to Argentina on Wednesday after booking their tickets before knowing if Australia had made the final, according to Sally Wilson, their Gunnedah-based aunt.

Now based in Brisbane, where he plays for Brothers, Wilson scored Australia's opening try in their 34-13 semi-final defeat of Argentina - despite playing with 14 players for all of the second half following a send-off.

Wilson has started at flanker in all of Australia's matches at the championships.

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Sally Wilson is "busting" with anticipation for the final.

She said the championships "couldn't be going any better" for her nephew.

"And he's put a lot of preparation into this over the last two or three years ... worked really, really hard," she said, adding that his diligence aided his "consistency".

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She said the 195-centimetre, 110-kilogram forward was a "workhorse", while his success had been an "achievement for the whole family".

Mandy and Cameron relocated with Wilson when he enrolled at Brisbane's St Joseph College, Gregory Terrace.

"Mum and Dad have been running him to and from grounds since he was four years old, five years old," Sally said

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Wilson is now part of the Queensland Reds' full-time main squad.

The Courier Mail said this month that he was being groomed to replace Bordeaux-bound Scott Higginbotham in the Reds' backrow next season, while rugby.com.au recently reported that the former two-time Australian Schoolboy was tipped to play Super Rugby "imminently".