Gibney works as a civil servant in the Irish tax office for seven years and then joins the Bank of Ireland. She studies for a drama degree while at the bank and joins the company’s amateur dramatics group. She trains to be an actress at Dublin Oscar Theatre School.
Gibney’s first professional acting role comes in 1996, with a minor part in Some Mother’s Son, a film starring Helen Mirren. In 1999, she appears in the film Agnes Browne as Winnie the Mackerel. In 2007, she appears in Prosperity as Linda.
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 begins playing in the 1990’s in the original Mrs. Browne, and subsequently the BBC sitcom Mrs. Brown’s Boys since 2011. She also appears 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. She and O’Carroll reprise their roles as the characters in the Netflix film A Madea Homecoming (2022).
In 2014, Gibney takes part in the twelfth series of Strictly Come Dancing. She is partnered with Irish professional Tristan MacManus. She and MacManus are the second couple to be eliminated in week three of the competition after dancing to ABBA‘s “Mamma Mia” on Movie Week. She competes in the bottom two against Blue star Simon Webbe and his partner Kristina Rihanoff.
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.
Having begun his career as a freelance musician, playing with the BBC Philharmonic orchestra and English National Opera North, an accident ends Cusack’s career as a musician, resulting in him pursuing a career in arts administration. Initially he focuses on the classical music sector, working at two leading concert venues in London, the Wigmore Hall and the Southbank Centre.
In 1992, Cusack makes his first move into theatre following his appointment as Administrative Director of West Yorkshire Playhouse in Leeds, alongside Jude Kelly, where he produces a number of plays including the touring production of Five Guys Named Moe for Cameron Mackintosh Limited. In 1996, he is appointed Head of Planning of the Royal National Theatre under the outgoing artistic director, Sir Richard Eyre, and subsequently with Sir Trevor Nunn and Sir Nicholas Hytner. In 2009, he becomes the National Theatre’s Associate Producer. During this period, he produces numerous productions for tour both in the UK and internationally, taking the work of the National Theatre to five continents. Alongside this, he works as a touring consultant for the Abbey Theatre in Dublin, the Royal Court Theatre, London, Fiery Angel in London’s West End, Canadian Stage in Toronto, Bangarra Dance Theatre in Sydney, TheEmergencyRoom and Corn Exchange in Dublin and Galway International Arts Festival. In June 2016, he is appointed Executive Producer of Wales Millennium Centre in Cardiff. In addition to this, he is Consultant Producer to the National Centre for the Performing Arts (India) in Mumbai.
As well as his theatre producing work, Cusack offers representation to a number of Irish artists including the director Annie Ryan, the composer Mel Mercier and the British playwrightMatt Wilkinson.
In 2023, Cusack is the recipient of the Olwen Wymark Award from the Writers’ Guild of Great Britain for his championing of new writing which is presented at the 18th Annual Awards Ceremony in London.