1920s
- Steve Allen
- Marlon Brando (1924–2004) both parents were of partial Irish ancestry
- Jack Cassidy
- Rosemary Clooney both grandfathers were Irish-American
- Judy Garland (1922–1969) maternal grandmother was an immigrant from Ireland
- Grace Kelly father is of Irish ancestry
- Jack Lord (1920–1998) film/stage/television actor
- Patrick McGoohan
- Anne Meara (1929– ) comedienne and actress, partner and wife of Jerry Stiller
- Cleo Moore
- Carroll O'Connor
- Donald O'Connor
- Maureen O'Hara immigrant from Ireland
- Eileen Ryan mother was Irish-American
- Maureen Stapleton (1925–2006) Oscar-winning film/stage/television actress
- Gene Tierney (1920–1991) stage/film actress
Read more about this topic: List Of American Actors Of Irish Descent