Mr Miller, who in 2010 finished 52 marathons in a single calendar year, has come on board to run for Team Cerebral Palsy League in the inaugural event.

Despite regularly visiting Queensland as a motivational speaker, this will only be Mr Miller's second competitive run in the River City, having previously run the Brisbane Marathon.

He said this time around he would be focused on raising money for charity rather than competing

“I'm not going to be up the front, I'm going to be in the mix with hopefully the rest of the CPL crew,” he said..

“These events to me are absolutely fun runs, they're just that, they're to be enjoyed and provide an opportunity for people to get out there.

“I don't like letting it all hang out at those sorts of races, I like taking lots of photos and talking to people on the way.”

Miller does have some tips for budding runners, however.

“My biggest piece of advice is to not worry about the finish line, just get to the start line and let the race take care of itself,” he said.

“You get to the start line and get swept up in all the excitement of it, they [fun runs] are magical events and people are really having a good time.

“Halfway through the run you're just laughing, thinking I can't believe I'm out here running 14 kilometres though the city and everyone's cheering.

"It's just a great feeling.”

The City2South, a sister event to the City2Surf in Sydney and the City2Sea in Melbourne, will take participants on a 14 kilometre course past some of Brisbane's most notable locations.

The run will start at 7am on June 16.

More information can be found at the City2South website.