Ant McPartlin will feature in this weekend's Saturday Night Takeaway - in a sketch which was pre-recorded for the TV show.
Entitled Saturday Knight Takeaway, it also stars Michael Sheen, David Walliams, Joanna Lumley and Emilia Fox.
Last weekend's ITV show was postponed and co-host McPartlin, 42, has been charged with drink-driving and returned to rehab.
The Sun said there were talks on whether the pre-recorded whodunnit sketch should continue when Saturday Night Takeaway returns this weekend.
But it was decided that the final two instalments - previous episodes aired earlier in the hit series - should be broadcast.
An insider told the Press Association: "Saturday Knight Takeaway will continue in this week's show and conclude during the series finale on Saturday 7th April."
Donnelly, 42, who recently confirmed he is going to be a father, will present the final two episodes of Saturday Night Takeaway alone.
McPartlin has taken a step back from his TV commitments and will return to rehab.
He will appear in court on April 4.