Prix de Diane 2026: Britain and Ireland Dominate French Oaks Field

Classic season continues this coming weekend. Hot on the heels of the Epsom spectacular which opened the month, Sunday sees the focus turn to France for the 2026 edition of the Prix de Diane. Commonly referred to as the French Oaks, this 1m2½f Group 1 affair sees the most talented French fillies attempt to repel runners from Britain, Ireland, and occasionally, beyond.

The French have managed to hang onto the valuable prize in each of the last three years, with Christopher Head, Patrice Cottier, and Francis-Henri Graffard all doing their bit to keep the Euros on home soil. However, the hosts may find themselves up against it in 2026. Of the 11 runners remaining in contention, no fewer than seven hail from a British or Irish yard. Included in that number is the filly who seems sure to start as a short-priced favourite.

Another Sparkling Display from O’Brien Star?

Of the 11 fillies on display in 2026, only two are yet to taste defeat at the track. The first of those hails from the yard of Aidan O’Brien and goes by the name of Diamond Necklace.

Together with stablemates True Love and Precise, this daughter of St Mark’s Basilica headed O’Brien’s juvenile fillies squad in 2025. And, like that duo, she already has a Classic win to her name in 2026. Whereas True Love triumphed in the English 1,000 Guineas and Precise claimed the Irish version, Diamond Necklace sauntered to a smooth success in the French 1,000 Guineas at Longchamp.

Now unbeaten in four career starts, the mount of Ryan Moore will bid to claim a French Classic double, following in the hoofprints of her sire, who won the French 2,000 Guineas and Prix du Jockey Club (French Derby) in 2021. Moments Of Joy will keep Diamond Necklace company on the trip to Chantilly but will need to take a significant step forward to challenge at the business end of the race.

Aidan O’Brien has won this race only once, with Joan Of Arc in 2021, but will have happy memories from his most recent visit to Chantilly. On 31 May this year, the Ballydoyle maestro’s three runners in the French Derby finished first, second, and third.

Classic Tilt for Lilt

The second unbeaten filly in the line-up represents Newmarket handler William Haggas. Nicely bred, by Lope De Vega and out of the Grade 1 winning mare Dank, Lilt is doing her best to live up to that pedigree promise. Showing admirable guts to land a soft ground event on her only start at two, she made her seasonal return in a Listed event at York’s Dante Meeting.

Not looking a likely winner when outpaced 2f from home, she made up ground hand over fist in the closing stages to score by a widening 1½l. That rated a fine effort on her first start of the year, and she looks well worth this step up in class. Haggas has nine French Group 1 wins on his CV, but not yet a French Classic. Perhaps Lilt could be the filly to put that right.

Evolutionist and Inis Mor Represent Newmarket Form

The 2026 Prix de Diane should serve as a useful guide to the relative merits of the English and French 1,000 Guineas form. Christopher Head’s Longchamp third Green Spirit joins Diamond Necklace in representing the French form, while Karl Burke’s Evolutionist and Inis Mor, from the David Menusier operation, both lined up in the Newmarket Classic.

Evolutionist fared best at HQ when no match for True Love but keeping on well for second and winning the race on her side of the track. That effort suggested she may appreciate this step up in trip. With Shane Foley in the saddle, she could go close for a trainer who won the 2018 edition of this with Laurens.

Inis Mor failed to land a blow when only 12th in the 1,000 Guineas but has since bounced back with a win over just short of this trip in the Listed Height Of Fashion Stakes at Goodwood. Oisin Murphy takes over in the saddle as French-born David Menuisier bids for a second European Classic, having previously struck in the German 2,000 Guineas with Devil’s Point in 2024.

The Brian Meehan-trained Esna, and Ed Walker’s Felicitas, complete the British raiding party. Esna ran well on her only previous visit to France, when fourth behind Diamond Necklace in the 2025 Prix Marcel Boussac, and warmed up for this with a Listed success over 1m2f at Newbury. Felicitas, meanwhile, has tasted defeat only once in three career starts, when going down by ¾l to subsequent Oaks runner-up Legacy Link.

Evita, Green Spirit, Habibi, and Pink Panthera represent French hopes in 2026, but the hosts may find themselves outnumbered and outgunned on Sunday afternoon.