George Smith is happy enough to play a big brother role but says "Cyclone" Tyrone Smith is well capable of fending for himself after answering an SOS call from Wallabies coach Robbie Deans to join his injury-hit spring tour squad.

The Brumbies centre was dubbed Cyclone Tyrone after capping a whirlwind month with a mad dash to the airport last week to make his flight to Tokyo, where the Wallabies opened their tour with a 32-19 loss to the All Blacks.

Smith barely had enough time to unpack after honeymooning in the US and Hawaii with wife Kristin before fielding a call from Wallabies team manager Phil Thomson, saying he had four hours to gather his passport, some boots and winter woollies and hop on another flight straight out of Australia.

He didn't need asking twice and was quickly up, up and away.

"This is one of my goals so I'm looking forward to getting out there and trying my best," Smith said.

A midfield force to be reckoned with, Smith could have easily earned the nickname for the barnstorming way he plays.

George Smith, Australia's most-capped forward with 105 Tests under his belt, said his kid brother has some rare qualities.

"You've seen through the Super 14 he's very good on his feet, he's quite strong in contact and he does a bit of work at the breakdown as well," he said.

"So, attacking-wise, he's a lot better than what I could ever be and he's also got a good defensive background from a couple of seasons in rugby league.

"So I'm very proud to have him here and it's a good opportunity that Tyrone has and I'm sure he'll be working very hard in the next few weeks to play some football in the midweek games and train and learn as much as he can."

The international rookie will get his first chance to impress Deans in Australia's second-string outfit's clash on Tuesday night with English club side Gloucester.

With centres dropping like flies, he could even end up in the Test side by the end of the tour.

A strong performance against Gloucester would give Deans the option of using an all-Brumbies midfield axis of Smith, Adam Ashley-Cooper and Matt Giteau somewhere in the UK or Ireland.

Smith says it'd be a dream to play alongside George with the Wallabies.

"I don't think so but, if it did happen, I'd definitely put my hand up to play for my country," the quietly-spoken newcomer said.

With his wife back in Australia, George promised to keep Tyrone in line.

"I haven't got any phone calls yet from her, but I'm here to look after him, make sure he does all the things right and keep him out of trouble," George said, adding he also had other ideas for Deans if he gets stuck.

"I've got another four more brothers who are keen to play in the Wallabies so if Robbie needs any back-up there..."

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