1. John Fitzgerald Kennedy
JFK's great-grandfather, Patrick Kennedy, came from Dunganstown, New Ross, Co Wexford.
The story goes that Patrick Kennedy scraped together enough money to get the boat to America to start a new life. Little did he know that his great-grandson would one day become one of the most powerful and popular figures in world history.
Little did he know that at the age of 43, John F. Kennedy would become the youngest man elected American president and the first Catholic.
2. Walt Disney
The creator of Mickey Mouse embraced the American Dream but his grandparents came from Co Kilkenny.
Thought to have emigrated in 1834, Walt returned over 100 years later on a"leprechaun hunt" before making the movie Darby O'Gill and the Little People.
3. Charles De Gaul
De Gaulle was a decorated officer in the French army during the First World War. He also fought in the Second World War before moving to London in 1940 from where he led a provisional government of France.
Following the war, he became Prime Minister and then President of the French Republic. In 1969, de Gaulle fulfilled a lifelong dream to visit his Irish ancestors’ homeland.
During his visit, he met President Eamonn de Valera. The French historian, Jean Lacouture, called them “the two fabled twins”.
4. Grace Kelly
The Kelly's originally came from Co Mayo.
In fact, she visited Ireland so frequently that Dublin’s Gresham Hotel named her suite after her.
She retired from films in 1956 to marry Prince Rainier III of Monaco.
In 1961, Princess Grace made the pilgrimage to Croagh Patrick, in her home county.
She was killed in a car crash in 1982.
5. Gene Kelly
Another incredibly famous Kelly – actor, singer and dancer Gene Kelly had Irish Canadian roots on his dad's side and his mother's grandfather came from Co. Derry.
Best known today for his performances in films such as An American in Paris (1951), Anchors Aweigh (1945), and Singin' in the Rain (1952), he was a dominant force in musical films until they fell out of fashion in the late 1950s.
6. Bing Crosby
Crosby became famous for that incredible voice, which made him the one of the best-selling recording artists of the entire 20th century.
Crosby's mum was second generation Irish-American, his family home is in Schull, Co Cork.
7. Billy the Kid
Known as Billy the Kid, the violent Henry McCarty was born to Patrick McCarty and Irish-born Catherine Devine in 1859 in New York City.
After he broke out of prison by escaping through a chimney, he took the phrase “fighting Irish” to a whole new level, wreaking havoc in The Wild West where it is claimed he killed 21 men – one for each year of his short life.
He was shot dead in 1881 by Sheriff Pat Garrett, who was also of Irish descent.
8. Muhammad Ali
The most exciting and articulate sportsman in the world was also was the son of one Odessa Grady Clay.
Ali's great-grandfather emigrated from Ennis, Co. Clare to Kentucky.
After six months of training with Martin, Cassius won his debut match in a three-round decision, and went on to become know simply as The Greatest.