Christmas movies have been a theme since Kielty took over as presenter of the Late Late Show in 2023 and that continues this year with the Dundrum man dressing up as The Grinch.
He has previously impressed audiences with his Elf show in 2023 and Home Alone in 2024, but this year he will need a lot longer in the makeup chair.
Kielty said he’ll be spending three hours there, using a combination of cosmetics and prosthetic moulds to transform into the infamous green humbug.
He added that it takes about an hour and a half to remove the look, joking: “Let’s see what happens.”
“Some would say that there’s very, very little transformation required facially for that [the Grinch] to happen,” Kielty said.
“So I am very much pushing back on that though.”
The opening of this year’s show will also feature Ballymena native, Liam Neeson, who has recorded a special voiceover.