The provincial derby will kick off at 8pm, with live coverage on Setanta Sports Ireland.
To purchase tickets for the all-Irish semi-final, please visit the Leinster website by clicking here.
In the other semi-final, the second-placed Ospreys will take on Glasgow Warriors, who finished third, at the Liberty Stadium on Friday (May 14). The Welsh-Scottish affair will kick off at 7.05pm.
Tickets for the grand final on Saturday, May 29 (kick-off 6.30pm) will be available to buy from the competing sides' ticket offices.