George, who rose to fame with the group on The X Factor in 2012, has already arrived in Brisbane for his stint in the jungle.
As it currently stands, George is the 4/1 early favourite to win, according to Betfair.
Novelties and politics trader for Betfair, Colm Rock, said: "No stranger to reality TV, having first emerged on X Factor, teen heartthrob George Shelley is swinging into the jungle as 4/1 favourite having attracted plenty of support before the line-up was announced."
While George is emerging as an early favourite, former footballer Kieron Dyer is tipped to be the first to leave.
Colm Rock continued: "Kieron Dyer is third favourite at 6/1 but will he stay for the duration? After a career plagued with bad luck, we make it 20/1 that he will leave the jungle due to injury."
Joining George and Kieron in the jungle will be Tony Hadley, Yvette Fielding, Chris Eubank, Jorgie Porter, Lady Colin Campbell, Duncan Bannatyne, Brian Friedman and Susannah Constantine.
I'm A Celebrity... Get Me Out Of Here! returns on Sunday 15 November on ITV.
Try Reveal's digital edition on iPhone & iPad. Subscribe now & never miss an issue!