Leinster, Munster, Connacht and Ulster are all playing
Eadestown's Jimmy O'Brien will start for Leinster in their Champions Cup game against Sale Sharks at the RDS tomorrow night.
Suncroft's Sam Prendergast has been named among the replacements.
Munster play Exeter Chiefs on Sunday afternoon and Athy's Jeremy Loughman and Eadestown's Tadhg Beirne are both down to start.
Suncroft's Cian Prendergast starts for Connacht against Saracens.
Eadestown's Diarmuid Kilgallen is among the replacements.
Finally, Celbridge's Marty Moore is on the bench for Ulster, who play Racing 92.
All-Ireland Football Winning Captain Seán Doherty Has Died Aged 78
Eight Irish Players Picked To Start Wednesday's Lions Game Against Brumbies
FAI To Appear Before Joint Oireachtas Committee
Cork To Play Tipperary In All Ireland Senior Hurling Final
Lottie Woad Claims Victory At Women's Irish Open In Maynooth
Defeat For Both The Kildare Women Footballers And Camogie Team
Former Arsenal Midfielder Thomas Partey Charged With Five Counts Of Rape
Kildare Ladies Footballers Aiming To Cause An Upset Against Kerry On Saturday
