page_title: Aidan O'Brien
hierarchical_section_title: Aidan O'Brien
caption_attribution_description: AP O'Brien preparing for the biggest day of his career
context_page_description: Aidan Patrick O'Brien is an Irish horse racing trainer. Since 1996, he has been the private trainer at Ballydoyle Stables near Cashel in County Tipperary for John Magnier and his Coolmore Stud associates.
context_section_description: Aidan Patrick O'Brien (born 16 October 1969 in County Wexford, Ireland) is an Irish horse racing trainer. Since 1996, he has been the private trainer at Ballydoyle Stables near Cashel in County Tipperary for John Magnier and his Coolmore Stud associates.
caption: Aidan O'Brien before the start of the 2012 Epsom Derby.
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