Sci-fi fan Burnett, from Auckland, paid $24 to submit a hilarious, self-filmed video to organisers outlining why he should be chosen. Ten thousand people from 100 countries have already applied to take the free trip.
In his promo clip, Burnett jokes he wants to be the first human to poo on another planet and be installed as an evil dictator.
"I'm told Mars is inhospitable, miserable and lifeless - just like Palmerston North but with better weather," he told the Herald on Sunday. "I'm now worried I will be picked to go because it will take seven months to get there and there is no way back if you don't like it.
"Another concern is as soon as I set foot on the surface my bones will turn to dust because the gravity is different to Earth."
Burnett, who quit Shortland Street in 2005 after playing drug-taking rebel Nick Harrison for 13 years, said he would take some earthly items with him in case of any close encounters.
"I was thinking of taking a few Shortland Street DVDs, but I wouldn't want extraterrestrials to form the impression we humans are a depressing race of beings that nothing good ever happens to," he said.
Burnett will next play a baddie in sci-fi comedy movie This Giant Paper Mache Boulder Is Actually Really Heavy.
He said he expects to hear within the next few months if he has been shortlisted for the first space crew to Mars.