Made In Chelsea star Spencer was removed from the jungle last Friday after just three days of joining the show as a late arrival.
Speculation as to if and who could be a possible replacement has been doing the rounds including Geordie Shore's Gary 'Gaz' Beadle, MIC's Jamie Laing and Union J's Josh Cuthbert.
After announcing Spencer's exit, show bosses made no mention of a replacement, and dismissing any speculation, Dec responded to a Twitter user on Tuesday night (24 November) who asked if a new celebrity was going into the camp.
Dec replied: "He's not being replaced. Sticking with these 12. (Anne Robinson would be great though!)."
Spencer's time in the jungle was dramatically cut short on Friday when ITV released a statement confirming his sudden departure.
Although the reason behind his shock exit was at first left unclear, Spencer released a statement two days later explaining that use of steroid pills had ruined his chances of staying in the jungle.
Spencer explained: "Why did I leave I'm a Celebrity? The simple answer is that I screwed up, and have some explaining to do. Shortly after I arrived in Australia I told the production team that I was taking a steroid-based medication that had begun some weeks ago.
"When I started taking this programme of pills it was in preparation for a charity boxing match which, ironically, never took place. Vanity, I suppose, had been the reason for wanting to bulk up a bit for the fight. I had intended to come off the pills gradually, but there was no time to do this before I reached the jungle.
"My admission to the production team that I was still taking these pills led to the conclusion that it would be unsafe for me to stay in the jungle - a decision which I found extremely hard to stomach. I pushed back but ultimately the show's duty of care prevailed and bags had to be packed."
A regretful Spencer later stressed that he would have liked to have continued on the show, but was not allowed to participate as show bosses had the final say.
He tweeted: "Leaving was obviously not my call! I would do absolutely anything to still be in there. Was loving it!"
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