The Prix de Diane Longines launching has taken place on 19 May, 2015, in the heart of the Bois de Boulogne. As Title Partner, Official Timekeeper and Official Watch, Longines joined France Galop to unveil the program of the 2015 edition.

The highlights of the day are the nine races including the Prix de Diane Longines, the world's top race for fillies, held during the afternoon on the Chantilly Racecourse. Longines will renew the Prix Longines Future Racing Stars where talented young jockeys from all over the world compete.
Moreover, amateur riders of the FEGENTRI (International Federation of Gentlemen and Lady Riders) will compete for the Prix de La Reine Marie-Amélie Longines.

Actress and former Miss World Longines Ambassador of Elegance Aishwarya Rai Bachchan will be present at Chantilly. She will be presenting the "Mademoiselle Diane par Longines" award during the afternoon to a young lady chosen for her outstanding elegance.
The venue of Aishwarya Ray Bachchan coincides with the launch event of the renewed Longines DolceVita collection, which will be garden party thrown by the Swiss watch brand in Chantilly on Saturday 13 June. The Official Watch of the Prix de Diane Longines is a new Longines DolceVita watch cased in steel, decorated with diamonds and featuring a silver-coloured “flinqué” dial adorned with painted Roman numerals.
Finally, on Friday 12, Longines and the Fondation de Chantilly will inaugurate the temporary exhibition of artistic and historical photography called “Turf”, which relates to the world of horse racing.