The two teams go head-to-head on December 7th in their first competitive clash since the 2011 Heineken Cup final.
And as well as Saints Nation Members, Season Ticket Holders can also book additional tickets. Tickets will then go on wider sale later this week.
To book tickets just log into your online ticketing account by CLICKING HERE. Saints Nation Memberships can still be booked online for £30 by CLICKING HERE. Hospitality bookings are being taken, too - CLICK HERE to email our commercial team.
It is sure to be a massive match that could live long in the memory. Leinster have won the Heineken Cup three times in the past five years, including that Cardiff epic just over two years ago. With a host of Irish internationals and several members of this summer's successful British and Irish Lions in their squad, including legendary centre Brian O'Driscoll, Leinster will be stiff opposition.
But the feeling around the Saints camp is positive, too. After having reached six finals in as many years, including the 2011 Heineken Cup and 2013 Aviva Premiership showpiece occasions, there is plenty of international talent at Franklin's Gardens, all of whom have the ambition to bring silverware back to the East Midlands.
It's a match that's not to be missed!