Tiger Roll - giving jockey Davy Russell his first win in 14 attempts - had to hold off an unbelievable late surge from fellow Irish raider Pleasant Company to take victory.
Jumping efficiently just behind the leaders, the recent Cheltenham Festival victor traded at a high of [17.0] in-running before making steady progress in the closing stages.
Tiger Roll is owned by Ryan Air's Michael O'Leary's Gigginstown House Stud operation, they had another superb Cheltenham but are yet to win the big one at Aintree.
The last gap success of Tiger Roll provided a second win in the race for Elliott, who guided Silver Birch to victory in 2007 and also trained the third-placed Bless The Wings, whilst the victory represented a second National victor in three years for Ryanair's chief executive Michael O'Leary.
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Bless The Wings, also trained by Elliott, kept on gamely for third, just holding off the well-fancied Anibale Fly who completed a 1-2-3-4 for Irish-trained runners.
The eight-year-old victor, who has won the Triumph Hurdle, National Hunt Chase and Cross-Country at the Cheltenham Festival in recent years, had come into the race well-fancied and was well in contention throughout before surging clear of the rest of the field late on. Just the preparation and the ground probably caught up with a wee bit."Brian (Hughes) said what a spin he gave him". All the way up the run-in I thought he wasn't going to get there and then right on the line I thought we had a shout. "It is not the end of his career, but I think it is marvellous that he can now add the greatest steeplechase to his CV".
"I've won this race a thousand times in my head, in my heart, at home". Tiger Roll's victory at 10-1 was being hailed by the crowd before cheers turn to anxious cries as the horse either got exhausted or began to idle.
The eventual victor saw off a late charge by the Willie Mullins' trained Pleasant Company to secure victory and a heroes welcome home in Summerhill, Co Meath.
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"It was a tense wait but then we heard he had got into the Grand National which is fantastic".
"On the way down the commentator said I was the oldest in the race so I thought "I'd better not come back next year".
But the 19-year-old said she would have to ask her father's permission before she was allowed to drive the prize - a Range Rover Evoque.
Miss Quinn said she was at the races with her family and friends and they had all entered the style contest together "for the craic".
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