Bosses are also said to be considering not discussing the matter at all, and get Dec to continue with the show as normal.
Ant, 42, will be off television "for the foreseeable future" after being charged with drink-driving following a three-car collision earlier this month. He appeared in the opening titles and also in the continuation of pre-recorded sketch Saturday Knight Takeaway which also starred Joanna Lumley in her regular role.
Throughout the programme Dec was supported by Davina McCall, Scarlett Moffatt and Stephen Mulhern, with the star addressing Ant's absence at the beginning of the show.
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Declan Donnelly - revealed on Twitter that he had been rehearsing solo.
'Just want to say a big congratulations to Dec @antanddec wonderful job tonight ant will be so proud of you bro and @ThisisDavina so good to see you on the show tonight x, ' one fan wrote, leading the troops.
An earlier photo showed the studio being prepared for tonight's show, along with the caption: "It's a studio day today, which means we're back on your telly tonight!" Night y'all. D x'.
There's been much speculation over the past few days as to whether Dec will address Ant when he hosts the show alone, as it was reported that "show chiefs have been agonising over whether Dec should apologise for Ant's no-show, ignore the incident or have no mention of Ant at all".
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"They want to be respectful to people involved in Ant's auto accident, while not bringing down the mood of the show".
He told him: "Dec is there something you want to tell me?"
But Dec made the decision to go ahead alone for the final two shows of the series for the fans after Ant's return to rehab.
He is expected to feature in a similar fashion in next week's grand finale which is being broadcast live from Orlando, Florida.
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