Stuart Lancaster has pleaded with Leinster fans to turn up early for Saturday's Heineken Champions Cup final.
The senior coach believes that a sea of blue can help his side over the line as they bid for a fifth star.
Ronan O'Gara's La Rochelle stand in their way, and 12 months ago the majority of a boisterous crowd of 59,862 roared their side on to a first ever European title.
The Aviva Stadium has experienced some incredible atmospheres for both big club and international games, however, it also stands accused at times of not generating the noise and colour that is often seen outside of Ireland, with supporters arriving late and then traipsing to and from the bars.
In addition, European Cup finals draw many neutrals, who buy tickets months in advance and go along for the occasion without necessarily getting behing either team.
It's a recipe for a flat atmosphere and Lancaster has urged supporters to make an extra effort.
"It certainly can play a part. Unbelievably so," he said.
"I was in the stadium for the Ireland-England Grand Slam game in March and the energy the Irish crowd gave the team that day...Ireland, as you know, didn't play their best but the energy the crowd give teams is incredible.
"There have been times for Leinster, over the last couple of years some amazing occasions when people have got in early, and they are in their seats and the teams are warming up and you can feel the energy build.
"Having been in a few European Cup finals now it’s often quite a cosmopolitan crowd in that a lot of people get tickets, who don’t know who is going to be in the final.
"So you get this mix and match of supporters from different countries but you’ve still got this hard core of people who hopefully have got tickets, who were born and bred in Leinster or certainly in Ireland and want to support the team.
"The energy they can bring is huge, whether it’s inspiring a player to go the extra yard, to influencing a player to make a play, it all has a part to play.
"It will be an amazing occasion so get in early, please."
When Ireland hosted France in this year's Six Nations classic, Les Bleus fans turned up in their thousands and largely out-performed their Irish counterparts on the terraces.
Ireland flanker Josh van der Flier, who played in Saturday's URC semi-final loss to Munster and last year's defeat to La Rochelle, also urged the fans to do their bit.
"We saw last year in Marseille, the support they had made for a brilliant atmosphere and we’re hoping for the same this year on our side with a few more blue flags," said the world rugby player of the year.
"It will be incredibly special to be playing in Dublin at home with all our family and friends watching on and the sea of blue Leinster supporters."
Watch the Heineken Champions Cup final, Leinster v La Rochelle, on RTÉ2 and RTÉ Player on Saturday from 4pm, follow a live blog on the RTÉ News app or RTÉ.ie/Sport or listen to live commentary on Saturday Sport on RTÉ Radio 1
