That makes him a major legend in the world of freestyle motocross, but he is also known around the world as the other half of Pink.
Now the pair are joining forces with something special for Australia _ a series of free 'events' in major cities where Pink is performing on her latest music tour.
There will be art, music and fashion but, best of all, a combination of cars and bikes and FMX action.
Hart is currently recruiting a team of Australia's best aerial bike experts and they will join him at five local shows, in the Hart & Huntington Freestyle Tour, from Melbourne through to the Gold Coast from May 30 to June 20.
"We are all too aware of what Australian's have been enduring with the floods, fires and financial crisis so we decided it was time everyone there had the opportunity to have a good time," Hart says.
"Australia and its people have been so good to my wife and I over the years and we honestly feel like this is our home away from home. "We want this to be a real reward for fans of the sport and wider culture that has provided me with so many opportunities."
The tour has backing from Holden and will kick off at Road Laver Arena on May 30, moving through Newcastle, Sydney, Brisbane and the Gold Coast finale - the only event not part of the Pink tour - on June 20.