The show's presenter Jeremy Clarkson has persuaded the Royal to be the 'Star in a reasonably priced car', according to The Sun.
A source told the paper: "The prince is a massive 'Top Gear' fan and is dying to give the Kia a spin. He loves driving and ideally he'd like to beat Tom Cruise just for the boasting rights."
They added: "He doesn't want it to be all about him. He wants to raise awareness of the Armed Forces."
The news comes on the day it is reported that the Prince has completed a training course to fly Apache helicopters and could fly them in Afghanistan as early as next Spring.
Previous personalities who have appeared in the popular slot include Simon Cowell, Sienna Miller, Jamie Oliver, Stephen Fry, Katie Price and Cliff Richard.
Tom Cruise briefly held the record time for fastest lap in the Kia Cee'd with 1:44.2, however, he was beaten in January by comedian John Bishop who achieved a time of 1:42.8.
If Prince Harry appears on 'Top Gear', it won't be the first time that a member of the British Royal Family has made an unexpected TV appearance...
Wonder if he'll have a go at Jezza for saying that "gingers smell different" or whatever it was he said.