West End star Ruthie Henshall and Paralympic gold medallist Hollie Arnold had previously been voted off this year's series.
The pair will leave the programme in a special episode which will be broadcast on New Year's Day.
The television programme was criticised in the Lords with one peer suggesting it should be called 'I'm an Idiot… Get Me Out Of Here!'
Patrick Jephson's comments were made in the Channel 4 documentary The Diana Interview: The Truth Behind The Scandal.
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Pop singer was criticised after pictures emerged showing her guests arriving for a private party in London
Alison Hammond and Dermot O'Leary are taking over the Friday slot from Ruth Langsford and Eamonn Holmes.
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The singer admitted attending a 'small gathering' for her 30th birthday and said it had been an 'inexcusable error'.
The actor said she wasn't aware microphones would pick up everything said in the castle walls.