Mullingar's Flynn will be appearing with Ryan Tubridy.
Midlands rising star Flynn is set to make his Late Late Show debut.
The Westmeath singer will make an appearance fresh from supporting Lewis Capaldi at two sold-out shows in London's O2.
Ryan Tubridy will also be joined by comedian Joanne McNally and broadcaster Charlie Bird tomorrow night.
Damian Browne will also speak about becoming the first man to row from New York to Galway, after spending 112 days at sea.
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