The Late Late Show will mark the 40th anniversary of Johnny Logan's Eurovision win with 'What's Another Year' tomorrow night.
The 'King of Eurovision' will celebrate the milestone with a special performance of the song.
Shay Healy, who penned winning entry of 1980, will also be on the show.
Among the other guests will be best-selling novelist Marian Keyes, who will discuss her latest work, 'Grown Ups', and give her hilarious takes on modern life and the pressures of everyday living.
Arlene Foster will also be in studio to mark Britain's exit from the European Union tomorrow at 11pm.
Tomi Reichental and Suzi Diamond, two holocaust survivors who went on to create lives for themselves in Dublin, will speak to Ryan Tubridy about their harrowing childhood concentration camp experiences 75 years after Soviet troops liberated Auschwitz.
There will also be music from Somebody's Child.