John Travolta was flying planks before becoming famous. Mick Doohan was introduced to helicopters by the late Barry Sheene.
The actor that played Wolf in Star Trek is also a plank pilot.
In UK the superbike rider John Reynolds was learning to fly helicopters as did the late Steve Hislop. Talking of ex DJ,s, TV people in UK as well as Noel Edmunds there is also Mike Smith(yes I know his user name)