It comes in the wake of the 20-year-old flyhalf's man of the match performance in a Super Rugby AU grand final triumph over James O'Connor and the Queensland Reds.

Lolesio and 12 Brumbies teammates will join Wallabies camp on Monday to launch an international campaign two days after he made a triumphant return from the hamstring injury which kept him sidelined for two months.

Among those on the bus with him will be Brumbies veteran James Slipper, who says age becomes irrelevant "if you're good enough".

Lolesio has proven to be just that throughout the club's triumphant Super Rugby campaign, quickly emerging as one of Australian rugby's brightest young talents at a time when the code is crying out for a star to sell to lure fans back to the code.

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"Like we've done here, if you surround him with experience, he's got a good platform," McKellar said.

"A good forward pack, which he'll have at the Wallabies, a good scrum, lineout, maul, and he can play on the front foot, then he is dangerous, he's very dangerous.

"He's certainly good enough, so age goes out the window there. He's proven it over the course of the year that he deserves a chance."

Just like the gamble McKellar took on the rising star when he picked him for a grand final despite not having a game under his belt since July. The Brumbies coach says it's easy to reflect in the aftermath of the decider and say that was an easy decision.

Especially after Lolesio potted 13 points and showed the class of a veteran well beyond his years in the tense victory over a relentless and at times overzealous Queensland outfit.

Now he finds himself as one of the genuine headliners in a new-look Wallabies squad, featuring 16 uncapped players, set to kick off the first of two encounters across the Tasman on October 11.

"I'm expecting it to be like the first day of school, rocking up and meeting everyone," Lolesio said.

"There will be a few familiar faces with the 20s boys coming in as well. I'm really looking forward to it, but I really want to enjoy [the grand final win].

"I'll just try to bring more energy. All of us young players coming through, I don't think we'll try to be cliquey or anything, we'll all buy in.

"To be honest I don't really think about age when I'm on the field. On the field you just want a five-eighth that knows his role and leads the team around. I just want to do my job.

"It's awesome. I'm just letting my play do the talking and the rest will look after itself. To be honest I haven't really thought that far, I was focusing on this game and enjoying the moment."