Michael Flatley dances at Wembley Arena in London, England during the £10 million world tour of his show "Celtic Tiger." The date was April 18, 2006. Seen to his left (our right) is Niamh O'Brien, whom he began dating the same year. They were married on October 14, 2006. "The wedding was attended by 250 guests and Niamh arrived in Michael's Rolls Royce Phantom wearing an £80,000 specially made Badgley Mischka dress," according to the Irish paper The Independent. "Celtic Tiger," created by and starring Flatley, debuted in 2005 and toured the world for over a year.