An actress who appeared in a 1998 romantic comedy film set in Ireland during World War II, also originated the principal female role in what Irish dance theatrical production? 
The Brylcreem Boys: The Brylcreem Boys is a 1998 romantic comedy film set in the Republic of Ireland during the Second World War. Jean Butler:  She is best known for originating the principal female role in the Irish dance theatrical production "Riverdance".
Riverdance