Comedian and actor Brendan O'Carroll is among the guests for tonight's Late Late Show.
The Mrs Brown's Boy star will join Ryan Tubridy on the show, along with The Saturdays singer Una Foden.
Irish footballer Kevin Walker, who won Swedish Pop Idol, will also be making an appearance.
There will be a trio of performances on the show, with Sharon Shannon and Wallis Bird will singing Christmas Time Again, Paul Harrington and Whitefriar Street Church Choir performing O Holy Night and Kevin Walker singing Where the Streets Have No Name.
Tune in at 9.35pm on RTÉ One.