It's that time of year when everyone reveals their true colours – maroon or blue.
For leading Australian personalities Jeff Horn, Yvonne Sampson, Chris Lynn and Jamie Whincup, there is no doubt which side their loyalty is invested in for State of Origin.
The Queensland Rugby League has released a promotion featuring the quartet lifting their day-to-day attire to reveal a commitment to the mighty Maroons.
Sporting the brand new ISC Queensland State of Origin strip, Horn, Sampson, Lynn and Whincup are proud to fly the flag ahead of Game I in Melbourne on Wednesday, June 6.
For WBO welterweight champion Horn it's a natural association, having attended MacGregor State High in Brisbane's south in his youth and recently working as a teacher at Pallara.
Each winter he has seen Origin fever first sweep over his classmates, then later his students.
Fox Sports presenter Sampson grew up in Palmwoods on the Sunshine Coast, attending school at both Maroochydore and Nambour.
Later she had a brief playing career with the Sunshine Coast Sirens rugby league team, before her television career exploded.
Big-hitting Queensland cricketer Lynn probably needs no explanation as to why he's proud to wear maroon.
He's represented the state since 2010, after being born and raised in Brisbane, graduating from Nudgee College.
Whincup's relationship is a little less immediately obvious, but just goes to show that no matter where you hail from, the draw of the Maroon spirit is strong.
All-time holder for wins in the Supercars Championship, Whincup was born in Melbourne but now considers himself a proud Queenslander, having lived in the Sunshine State for 12 years.
Another interesting Victorian link among the quartet is that Horn had his first professional fight in the host state for Game I.
It's predicted the outward and enthusiastic display of loyalty by the four Maroons supporters will encourage others to do likewise in the lead-up to the series opener at the MCG.
Victorians are neck-and-neck with Queenslanders in their distaste for anything New South Wales, creating a strong synergy between the two states.
Becoming a Maroon Member is easy and, with memberships starting from as low as $15, there is a way for all fans to be involved.
Simply head to www.maroonmember.com.au to find a package for you.
Membership uptake in 2018 is eclipsing levels from 2017, and with proceeds assisting the grassroots levels of the game, it's a pleasing boost to rugby league all around Queensland.