Retweeting a comment from a fan about him taking part in the ITV1 show, The Rock, real name Dwayne Johnson, wrote: "Garbage rumour."
However, one celebrity who has been dropping hints about taking part is Made In Chelsea star Hugo Taylor.
The reality TV favourite said on Twitter: "Leaving on a jet plane. Don't know when I'll be back again... Well I do actually. December. But none the less. See you all soon. Peace."
Birds of a Feather actress Linda Robson and Conservative MP Nadine Dorries are the first celebrities who have landed in Australia for the show's 12th series.
I'm a Celebrity launches on Sunday, November 11 at 9pm on ITV1.
I'm a Celebrity 2012 - Latest Rumours: