1. Abigail Breslin

Abigail Kathleen Breslin ( born April 14th 1996 ) is one of the youngest actresses ever to be nominated for an Academy Award for her work in Little Miss Sunshine. She is the daughter of Michael Breslin and Kim Walsh, both of Irish heritage.

2. Demi Lovato

Demetria Devonne “Demi” Lovato ( born August 20th 1992) is a singer-songwriter, musician, and actress. Most recently she served as a judge on the American version of hit show ‘X-Factor’. She has Mexican, Irish and Italian roots. Her Mother Dianna De La Garza (née Hart) is of Irish descent.

3. Vanessa Hudgens

Vanessa Hudgens ( born December 14th 1988) is an actress and singer.She is best known for her portrayal of Gabriella Montez in the High School Musical series, and for being the former other half of Zac Efron. She was raised a Roman Catholic, and her Father Gregory Hudgens is of Irish and Native American Heritage.

4. Megan Fox

Megan Fox ( born May 16th 1986) is an actress best known for her role as Mikaela Banes in the Transformers movie. She is of Irish, French and Native American ancestry. She attended Catholic school for 12 years. Her Irish connections come through her Father; Franklin Thomas Fox.

5. Zooey Deschanel

Zooey Deschanel ( born January 17th 1980 ) is an actress, musician, and singer-songwriter. She is probably most famous for her role as Jess Day in the Fox Series ‘New Girl’. She has swiss, dutch, English, Irish and French roots. She was raised Roman Catholic, and her Irish ancestry comes through her mother’s side; Mary Jo Deschanel ( née Weir ).

6. Anne Hathaway

Anne Hathaway ( born November 12th 1982 ) is an Academy award -winning actress known for her roles in Les Miserables, Rachel Getting Married, and The Princess Diaries. She has stated that she “wanted to be a nun” when a child due to her strong Roman Catholic upbringing.She is of Irish and French ancestry. Her Irish roots come from her Mother Kathleen Ann "Kate" (née McCauley).

7. Drew Barrymore

Drew Barrymore ( born February 22nd 1975 ) is an actress, film director, screenwriter, producer, and model. She endeared herself to film audiences at a very young age with her portrayal of Gertie in Steven Spielberg's E.T. She is of English and Irish ancestry, with Irish roots on both her Father and Mother’s sides.

8. Katherine Heigl

Katherine Heigl (born November 24th 1978) is an actress and producer. She is probably best known for her role as Dr.Isobel Stevens on ABC drama ‘Grey's Anatomy’. She is of Irish and German descent, with a strong Irish connection on her Father , Paul Heigl’s side.

9. Olivia Wilde

Olivia Wilde ( born March 10th 1984) is an actress who has appeared on such T.V shows and Film productions as The O.C, The Black Donnellys, House, Cowboys & Aliens and In Time. Her Father Andrew Myles Cockburn was born to British parents, but raised in Ireland. Wilde has dual citizenship of the United States and Ireland, and derived her stage name from famed author Oscar Wilde.

10. Alyson Hannigan

Alyson Hannigan ( born March 24th 1974) is an actress known for her roles in the hit T.V shows ‘Buffy The Vampire Slayer’, and ‘How I met Your Mother’.She is of Irish and Jewish descent, but has strong Irish roots on her Father’s side. Hannigan even named her daughter Keeva , an alternative spelling to the traditional Irish ( Caoimhe) in honour of her Irish background.