According to The Sun, regular host Mark Durden-Smith has been axed, while Matt Willis and Emma Griffiths have pulled out due to family commitments.
"Matt and Emma will be new parents and won't be going so viewers can expect some exciting new changes," said a source.
"With Matt and Emma going it's a chance to rip up the format and start again. Mark understands and has done a good job over the years."
GMTV host and Dancing On Ice contestant Michael Underwood and partner Angellica Bell are apparently in the running to take over.
Former contestants David Van Day and Timmy Mallet were linked to the job at the end of 2008.
The new series of I'm A Celebrity... kicks off in November.