Mary McAleese, Mary Kennedy, Pat Shortt, rowers John O’Driscoll, Conor McCarthy, Daragh Kelly, Enda McNicholas, and Roger McMorrow, Irish Gladiator 'Cyclone,' and The Tumbling Paddies are all on RTÉ's Late Late Show tonight, January 31.

Ahead of Friday's episode, "Late Late" host Patrick Kielty was challenged to a 'Know Your Mary' game:

Leading the "Late Late" lineup on Friday are former President of Ireland Mary McAleese and former broadcaster Mary Kennedy, who are now hosts of "The Changing Times" podcast. From their thriving friendship and not retiring, to the state of the world and the upcoming Irish Presidential election, the two Marys will sit down with Patrick to set the world to rights.

Actor and comedian Pat Shortt, who is marking his 30th year on screens this year, will chat with Patrick about his career highs and share his memories of the late, great Jon Kenny and their beloved comedy act, "D’unbelievables."

Home from the world’s toughest row, Team Power Of 1's John O’Driscoll, Conor McCarthy, Daragh Kelly, Enda McNicholas, and Roger McMorrow will all join Patrick for a "Late Late Show" homecoming celebration. In what was a heroic journey that had the country row in behind them, they rowed across the Atlantic Ocean from San Sebastian de La Gomera, Spain to Antigua. Team Power of 1 were raising funds for children born with congenital heart disease in Ireland in memory of John’s 13-year-old daughter Saoirse, their honorary sixth crew member.

The first-ever Irish Gladiator, Cyclone, will also be in studio. From Wexford, Cyclone will be chatting about how she went from being a powerlifting world champion to dominating the Gladiator arena and the reaction to her debut on the hit show.

And finally, Co Fermanagh’s The Tumbling Paddies make their return to "The Late Late Show." Bringing their unique Trad/Pop sound, the six-piece band will perform "Night on the Town." They'll also be teaming up with some audience members as their musical knowledge is put to the test in an exciting game known as "What the Folk?"

"The Late Late Show," sponsored by PTSB, airs tonight, Friday, January 31, at 9:35 pm Irish time on RTÉ One and RTÉ Player.

Related: Irish Politics, Music, Podcasts, Sports, TV & Streaming