They have been brothers in arms often enough.
Saturday’s Scottish Cup semi clash between the Dons and Hibs, however, will be a totally new experience for local loons Andrew and Graeme Shinnie.
It will be the first time Dons vice-captain Graeme and Hibs midfielder Andrew, who is on loan to the Edinburgh club from Birmingham City, have gone head-to-head in a competitive match.
They locked horns in a friendly between Inverness and Birmingham in 2014.
But it will be the real thing for the Shinnie brothers down in Glasgow this weekend as they battle for the right to play in next month’s Scottish Cup final back at the national stadium.
It will be a proud day for them and their family – but also for their old school, Kincorth Academy.
Both played in the colours of Kincorth before making it big.
Retired teacher Sandy McNaughton, who ran the school’s Under-13 side for many years, is delighted two of their former pupils will be centre stage in one of Scottish football’s biggest games of the season.
“It’s something Kincorth Academy can be proud of,” said Sandy.
“It’s already been a pretty good year for the school because Ryan Fraser, another former pupil, made it into the Scotland squad.
“But having two brothers who also played for Kincorth facing up in a Scottish Cup semi-final is quite a thing.
“Graeme also captained Inverness to victory in the tournament a couple of years ago and Andrew has been capped for Scotland.
“It’s good for the prestige of the Academy when things like that happen.”
The Shinnies – Andrew is two years older than Graeme – also played for Cove and Dyce Boys’ Clubs during their early years.
But their love for football was honed in the back garden of their family home in Cove.
Graeme speaks fondly of those early days playing football with his older sibling. He said: “We used to play football in the garden, like brothers do.
“Andrew would stick me in goals and blast the ball at me.
“I think he wanted me to become a goalkeeper back then so the semi might be a chance for me to get payback for all the balls he fired at me.
“At the boys’ clubs he was always in a different age group. We used to play with our mates in the park as well, in big games of about 18-a-side.
“He had his own mates and I had mine but when we were sitting in the house bored we used to go out and play.
“So to play against each other at Hampden in a Scottish Cup semi-final will be really special for everyone.
“Compared to the old days in the park beside my mum and dad’s house it will be like a different world.”
As you would expect, they were almost inseparable when Andrew joined Graeme at Inverness in 2011, after being released by Rangers.
Graeme said: “It was great to finally play alongside him.
“Our career paths have been quite different.
“I signed for Inverness when I was 16 and went full-time the year after. By that time Andrew had already been in Glasgow for a few years with Rangers.
“That made getting back together even better. We lived together and it was good making him do my dishes every night.”
Andrew’s memories of that time are of long hours battling it out to see who was the best at the computer football game FIFA.
Andrew said: “We have always had a competitive edge in little things like computer games.
“There was a bit of arguing, but no violence.
“We probably did fight a lot when we were kids but as we got older we just tried to help each other.
“It has never been about trying to do better than each other.
“We just both want to make our family proud.”
They have certainly made their old school proud.
Sandy has fond memories of the time each played for his U13 side on Saturday mornings. Sandy said: “Andrew, of course, was the first to be involved.
“You could see right away he had something special about him. It was always felt he had the potential to do well in the game.
“We couldn’t believe our luck when Graeme came along a couple of years later and proved to be just as good a player.
“Their father deserved a lot of credit because he insisted on them being allowed to play for their school at a time when the professional clubs were encouraging them to play for their development sides instead.
“Their father felt playing competitive games would be better for their development.
“The fact he will be there at Hampden watching them going for glory in the semi suggests he was right.”