It's an all Irish affair tomorrow night on The Late Late Show, which it normally is most weeks but at least this week they have an excuse.

The show will be looking at the ancestry of some famous Irish faces tonight, as earlier this year Maura Derrane, soccer pundit Eamon Dunphy, comedian Jason Byrne and politician Michael Healy-Rae agreed to have their DNA tested. On Friday night they will find out the results live on air with’s Mike Mulligan as they’ll be finding out exactly where they came from and who they are connected to. As it turns out, one of them is even 100% Irish - our money is on Michael.

As well as that, football legend Paul McGrath will be in to chat to Ryan about Ireland's chances ahead of our crucial World Cup Qualifier against Wales. He’ll also be talking about the glory days of Irish football and what life has been like for him since hanging up his boots.

Did you know Dublin is home to the second oldest zoo in the world? On Friday night, The Late Late Show will be joined by the zookeepers charged with looking after the animals as they gear up for the busy summer season. There’ll be a live link-up up with Dublin Zoo and the newest addition to the zoo’s bongo herd will be christened.

Olympian Annalise Murphy will be dropping by following her stint as Grand Marshall at the St Patrick’s Day Parade to chat about how life has been since she captured silver in Rio and her prospects for Tokyo 2020.

A perennial favourite, The Late Late Show Antiques Special is back as viewers will meet the brave souls who’ll be transforming some unloved furniture into treasures to keep.

Catch The Late Late Show, St Patrick’s Day, RTÉ One at 9.35pm