A prize-money boost for the Palmerstown House Estate Irish St Leger has seen the Curragh Group One attract Gold Cup winner Estimate.

Including the Michael Stoute-trained filly, 38 of the 73 initial entries are trained overseas and include former Melbourne Cup winner Dunaden, his old rival Red Cadeaux, Godolphin's Cavalryman and Encke plus Marco Botti's Tac De Boistron.

Japanese representative Denim And Ruby has been entered for the race as well as the QIPCO Irish Champion Stakes during September's Irish Champions Weekend, while Aidan O'Brien's Leading Light heads the home team.

General manager Paul Hensey said: "The increased prize-money of €300,000 for the Palmerstown House Estate Irish St Leger, which is up by 50% compared to last year, has definitely had the desired effect in attracting all the top staying horses from Europe, as well as a very welcome Japanese entry in the shape of the top-class Denim And Ruby.

"Our aim is to ensure that the race is at the forefront of the major long distance races in the world and we are very pleased to have achieved our first objective of attracting a top-quality initial entry."