Shane Warne has explained his theory of human evolution on Australian TV show I'm A Celebrity ... Get Me Out Of Here!.

The former spin king used the latest episode to espouse his theory on evolution - that humans are the result of aliens.

"If we've evolved from monkeys why haven't those ones evolved?" he asks.

"I'm saying aliens. We started from aliens."

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Warne goes on to explain the pyramids could not have been built by humans.

"You couldn't pull a bit of rope, those big huge bits of brick, and make them perfectly symmetrical. So who did it?

"Whatever planet they're on out there, they decided that they were gonna start more life here on earth and study us.

"Maybe they turned a few monkeys into humans and said, 'yeah, it works'."

Warne also opened up about his bromance with Coldplay frontman Chris Martin, saying the pair met in a hotel lift taking girls up to their room.

The Aussie cricket legend revealed how the pair met in a hotel lift 16 years ago.

"I'm in the lift. I've got someone with me," Warne explains.

"I'm trying to sneak up to my room.

"I notice a guy in a corner. He also had someone."

Warne tells his camp mates the pair recognised one another and then hung out in his room.

"He said what are you doing? I said: 'I think I'm doing the same as you'," he said.

"I went up to his room, we had a bit of a giggle.

"Then we sat there and talked all night until the sun come up.

"You know when you just click? Ever since then we've been good buddies."

- AAP