Jennifer Ann O'Carroll (née Gibney; born 7 July 1964) is an Irish actress. She is best known for playing Cathy Brown in the BBC television sitcom, Mrs. Brown's Boys and its adaptions. She also appeared as contestant on the twelfth series of Strictly Come Dancing in 2014.

Jennifer Ann Gibney was born on 7 July 1964 in Dublin, Ireland.^[1][2] She worked as a civil servant in the Irish tax office for seven years and then joined the Bank of Ireland. Gibney studied for a drama degree while at the bank and joined the company's amateur dramatics group. She trained to be an actress at Dublin Oscar Theatre School.^[3]

Gibney's first professional acting role came in 1996, with a minor part in Some Mother's Son, a film starring Helen Mirren.^[4] In 1999, she appeared in the film Agnes Browne as Winnie the Mackerel.^[5] In 2007, she appeared in Prosperity as Linda.^[6]

Gibney's most prominent role is her portrayal of Cathy Brown, the daughter of Agnes Brown, played by her real-life husband, Brendan O'Carroll, a part she began playing in the 1990's in the original Mrs Browne, and subsequently the BBC sitcom Mrs. Brown's Boys since 2011.^[7] She also appeared as Cathy in the film adaption Mrs. Brown's Boys D'Movie and the talk show All Round to Mrs. Brown's between 2017 and 2020.^[8][9] Gibney and O'Carroll reprised their roles as the characters in the Netflix film A Madea Homecoming (2022).^[10]

Gibney has been married to Brendan O'Carroll since 2005 and has three stepchildren, Fiona and Danny, who also appear in Mrs. Brown's Boys, and Eric.^[16][17]