This list includes famous Irish Americans of both today and throughout history, hot pics included! (Famous Irish people take great photos.) All of the most important Irish Americans are listed, and additional biographical data is included for many.Irish immigrants are part of the fabric that is the great American melting pot. Many arrived in America during the early to mid 1800s, following the Great Irish Famine. Important Irish people in the US include many leading entertainers, renowned authors, and distinguished politicians (including, of course, JFK).