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Michael O'Leary is one of the most popular and richest Business Executive who was born on March 20, 1961 in Kanturk, County Cork, Ireland.

O’Leary grew up near Mullingar, County Westmeath. His father was the part owner of a textile factory. He was educated at Clongowes Wood College, County Kildare before studying business and economics at Trinity College, Dublin. After graduating in 1983, he worked as a trainee with Stokes Kennedy Crowley (later known as KPMG), studying the Irish tax system. He left after two years in 1985, setting up profitable newsagents in Walkinstown and Terenure, Dublin.

While at Stokes Kennedy Crowley, O’Leary had met Tony Ryan, head of Guinness Peat Aviation, a leasing company (GPA). Ryan was one of KPMG’s clients and O’Leary advised Ryan on his personal income tax affairs. In 1987, Ryan hired O’Leary as his personal financial and tax advisor, where Ryan’s main interest was in GPA.