Italian Irish actors

Motion Picture actors frequently use a stage name to seem more main stream for the movie going public. The American actor Guy Williams who starred in the Walt Disney tv show ZORRO is a good example. His parents were both Sicilians, he was born in New York, nad his real name was Armand Catalano. Are there any well known Irish/Italian film actors working in movies today? If so, can anyone provide me with the names of Irish born cinema actors of Italian ancestry?

Garibaldiguard