O'Shea Irish Dance, Minneapolis and St. Paul, Minnesota

Cormac O'Se was born in Dublin, Ireland, into a family where Irish dancing is a way of life. His father and mother, Seamus O'Sé & Aine Uí Shé are long standing members of An Coimisiun le Rince Gaelacha, and directors of Dublin's renowned Scoil Rince uí She. Seamus and Aine started their school in 1971, producing eight World Champions, holding twenty-nine World Solo titles, eleven of those being held by Cormac's brother Colm, the most decorated Irish dancer in history. Their students—including their own three children—have been part of Riverdance from its inception.

The O'Shea family has been performing and teaching in Europe and America since 1979. Their shows Irish Thunder and Emerald Beat, created by Aine and Seamus, have been featured at Busch Gardens in both Williamsburg, Virginia and Tampa, Florida since 2001 under the direction of Cormac's sister Dara O'Shea Delap.