“I remember the very first rally he did in a Fiesta, which was around 2007,” he says.
“His Dad [Irish national rally champion Ray Breen] hired a car off M-sport for the Malcolm Wilson Rally. The was the very first time I met him – when he literally started his career.
“He then moved to the one-make Fiesta Sporting Trophy, which I was the co-ordinator for, and saw him and Gareth [Roberts, Breen’s late co-driver] experience all the highs and lows – I spent a lot of time with them.
“We were all just young and having fun, doing what we wanted to do. I don’t think anybody ever expected any of us to get to the level we all got to.”
While a superstar ability may not have been initially obvious, Millener says Breen’s continued commitment ultimately told its own story.
“You remember the person in general more than specific examples,” he says. “Without realising it, what started out as just a bit of fun blended into a professional career.
“He just ended up doing more and more rallies: the Fiesta Sport Trophy International, which was on WRC events, to Junior WRC, Super1000s and R5s.
“You don’t really recognise the talent early on, you just think ‘Let’s keeps progressing.’
“But deep down there was obviously this massive desire to do well. When he got to the Citroën WRC team [in 2016], that’s when you sat back and realised he had the potential to get to the top.”
Breen had suffered the intense tragedy of losing his close friend and co-driver Gareth Roberts in a crash during mid-2012, but found the inner strength to keep going to secure the IRC title at the end of the season.