How many Aidan O’Brien 1000 Guineas winners has there been? We assess all of the Ballydoyle maestro’s chances in Sunday’s Classic at Newmarket.
How Many 1000 Guineas Winners Has Aidan O’Brien Had?
It’s been a few years since he’s won this race but Aidan O’Brien has SEVEN 1000 Guineas winners – with his last coming in 2021.
He’s had three more 2000 Guineas winners (10), but has a solid chance of making it eight in the second Classic of the season on Sunday.
Virginia Waters Gave O’Brien His First 1000 Guineas Win
O’Brien won his first 1000 Guineas in 2005 with Virginia Waters. Although after winning at Newmarket, she disappointed in all of her final races and never won again.
She would go off joint-favourite for the Epsom Oaks two starts later but was well beaten, finishing fourth.
Virginia Waters certainly wouldn’t have been as memorable as the likes of Minding and Love who also won the race and are considered two of O’Brien’s greatest ever fillies.
His last win in the race was Mother Earth in 2021 under Frankie Dettori.
Love Was Aidan O’Brien’s Best Ever 1000 Guineas Winner
O’Brien has never been shy to talk about just how much he adored LOVE, who won the 1000 Guineas in 2020.
He is known to have described her as one of his best ever fillies, and after winning the 1000 Guineas, she recorded an emphatic nine-length win in the Epsom Oaks.
She was only the second O’Brien horse to complete the famous double, alongside Minding who is also highly respected among O’Brien’s greats.
WATCH: Love Wins 1000 Guineas in 2020
All SEVEN Aidan O’Brien 1000 Guineas Winners
- 2005 – Virginia Waters
- 2012 – Homecoming Queen
- 2016 – Minding
- 2017 – Winter
- 2019 – Hermosa
- 2020 – Love
- 2021 – Mother Earth
Aidan O’Brien 1000 Guineas Runners
PRECISE has been at the top of the 1000 Guineas betting odds for most of 2026 and for good reason as well.
The Starspangledbanner filly made up for her losing debut by winning four races on the bounce to finish her two-year-old season – including two Group 1s.
She won the Moyglare at the Curragh last September before winning the Fillies Mile at Newmarket on her final start last year.
Although Precise was an intended runner at Del Mar at the end of October. However, she was declared a non-runner on the day due to coughing.
It’s yet to be seen, but it might be a positive that she didn’t engage at the Breeders’ Cup, as those races in America can often take it out of young horses.
That win over course and distance is a huge positive for her chances in Sunday’s 1000 Guineas.
WATCH: Precise Bolts Up In Fillies Mile
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PRECISE wins the @bet365 Fillies’ Mile 🏆@NewmarketRace | @coolmorestud pic.twitter.com/gat5Ea3okW
— Racing TV (@RacingTV) October 10, 2025
Another classy filly O’Brien has in the race is DIAMOND NECKLACE, who was unbeaten as a two-year-old.
She made the perfect start to her career last August when winning at the Curragh on debut, before easily winning a listed contest at Leopardstown when next seen.
She would end her season with a Group 1 win on Arc weekend at Longchamp. Christophe Soumillon was aboard for her win in the Prix Marcel Boussac on her first try over a mile.
O’Brien seemed to fancy her chances if turning up at Newmarket, saying she’s carrying less (weight) than Precise – who could come on for her first run of the season.
It’s unknown if they will both be declared for the 1000 Guineas when final declarations take place, but all eyes will be on the Coolmore battalion.
True Love and Venosa complete the four-runner hand for O’Brien and Ballydoyle.
WATCH: Diamond Necklace Wins French Group 1 On Arc Weekend
1000 Guineas Betting Odds
- Precise 9/4 (Aidan O’Brien)
- Diamond Necklace 5/1 (Aidan O’Brien)
- Venetian Sun 6/1 (Karl Burke)
- True Love 7/1 (Aidan O’Brien)
- The Prettiest Star 14/1 (Ed Walker)
- Abashiri 16/1 (Charlie Appleby)
- Evolutionist 16/1 (Karl Burke)
- My Highness 16/1 (Andre Fabre)
- Touleen 16/1 (Owen Burrows)
- Inis Mor 20/1 (David Menuisier)
- Azleet 25/1 (Stuart Williams)
- 50/1 BAR
- Venosa 150/1 (Aidan O’Brien
