Quick Info
| Profession | Horse racing trainer |
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| Nationality | Irish |
| Date of Birth | 16/10/1969 |
| Age | 57 years |
| Birthplace | County Wexford, Ireland |
| Zodiac Sign | Libra |
Latest News about Aidan O’Brien
17/10/2026
Minnie Hauk won the Qatar Racing British Champions Sprint Stakes at Ascot on British Champions Day, putting O'Brien ahead of Andrew Balding in the race for the British trainers' championship. The result gave O'Brien a possibly decisive advantage in the title race.
20/06/2026
Aidan O'Brien claimed the leading trainer title at Royal Ascot for a 14th time, holding off a strong challenge from his son Joseph. Ryan Moore also won the leading rider title at the meeting.
06/06/2026
O'Brien trained the winner of the 2026 Epsom Derby, a Classic win that he described as his 50th British Classic. He credited the owners and the wider Coolmore and Ballydoyle team for the success.
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Bio/Wiki
| Summary | Irish flat and jumps racehorse trainer, based at Ballydoyle in County Tipperary since 1996, and widely regarded as among the most successful trainers in the sport's history. |
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Educational Qualification(s)
| Primary | Donard National School, County Wexford |
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| Secondary | Good Counsel College, New Ross, County Wexford |
Personal Life
| Residence | Near Ballydoyle, County Tipperary |
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| Lifestyle | Non-drinker and member of the Pioneer Total Abstinence Association |
Relationships & More
| Spouse | Anne-Marie O'Brien (née Crowley) |
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Family
| Father | Denis O'Brien (died 01/12/2008) |
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| Mother | Stella O'Brien (née Doyle) |
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| Children |
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Career
| Early Career | Worked as a stable lad with P.J. Finn at the Curragh and then with Jim Bolger at Coolcullen, where he became assistant trainer | ||||
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| Jumps Career | Took over his wife's training licence at Piltown, County Kilkenny, in 1993 and became champion amateur rider and later champion jumps trainer | ||||
| Flat Career | Moved to Ballydoyle Stables in 1996 as private trainer for John Magnier and the Coolmore Stud associates, and became Ireland's youngest champion trainer that year | ||||
| Focus Change | Trained only flat horses after the retirement of Istabraq in 2000 | ||||
| Notable Horses |
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| Honours | Inducted into the British Champions Series Hall of Fame in 2024 | ||||
| Recent Achievements |
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Some Lesser Known Facts
| 1. Took over the Piltown licence from his wife, who had held it as a champion jumps trainer | |
| 2. Trained for John Magnier at Ballydoyle, a stable formerly led by Vincent O'Brien, who is not a relative | |
| 3. Is a non-drinker and a member of the Pioneer Total Abstinence Association |
