A FORMER Melbourne co-captain was just another Richmond fan and just another brother on Saturday night.

Jack Grimes, who played 100 senior games for the Demons, was at the MCG to watch his younger brother Dylan win a second AFL premiership and complete his greatest season as a player.

They're two of eight siblings. 

Jack, at 30, is two years older than Dylan but would avoid backyard fights with him as kids, because the future Tiger would "always beat me up". 

Dylan also mocked him mid-interview with AFL.com.au about being back in media mode three years after his AFL career ended, yet just as telling about their special relationship was what Jack saw. 

"I've never seen him as happy as what I'm seeing him right now," Jack said. 

"He's just sung the song with 21 of his best mates and he turns around to us, his family, and gets to celebrate with us as well.

"I'm sure it's a moment I'll never forget and I'm sure it's a moment he'll never forget – and I'm just so happy to be a part of it." 

Dylan Grimes at the Grand Final Premiership Party.

Jack wasn't there for Richmond's 2017 triumph, with the family tickets going to other siblings on that occasion. 

However, he's watched Dylan's career blossom from close range, from a draft afterthought – the Tigers nabbed him in the pre-season draft in 2009 – to a Virgin Australia AFL All Australian defender a decade later. 

GRAND FINAL MATCH REPORT Orange crushed as Tigers roar again

Richmond's premiership hopes were supposed to be shot when five-time All Australian Alex Rance suffered a season-ending knee injury in round one.

Instead, Dylan Grimes – who Jack said "idolised" Rance – became arguably the game's No.1 defender as the Tigers won their second flag in three years.

Dylan Grimes and Alex Rance on Saturday afternoon.

"Dylan's got a lot going well for him in his life," Jack said, with a proud smile plastered across his face. 

"He's about to get married, then there's his winery – he's ticking a lot of boxes there – but I don't think I've ever seen the pure elation on his face like I saw then.

"I couldn't be happier for him." 

It's ours: Dylan Grimes (l) and Trent Cotchin react as the final siren sounds.