This is what we found on Wikipedia regarding the Michael Flatley's Lord of the Dance:

Michael Ryan Flatley (born July 16, 1958) is an American former professional performer and choreographer of Irish dance. Flatley is credited with reinventing traditional Irish dance by incorporating new rhythms, syncopation, and upper body movements, which were previously absent from the dance. He created and performed in Irish dance shows Riverdance, Lord of the Dance, Feet of Flames, Celtic Tiger Live and Michael Flatley's Christmas Dance Spectacular. Flatley's shows have played to more than 60 million people in 60 countries and have grossed more than $1 billion. He has also been an actor, writer, director, producer, musician, and philanthropist.

Flatley formerly held the Guinness World Record for tap dancing 35 times per second, and his legs were reportedly insured for £25 million. Flatley retired from dance in 2016 due to constant spinal, knee, foot, and rib pain. In January 2023, he was treated for "an aggressive cancer", which is now in remission.