Gibney's first professional acting role came in 1996, with a minor part in ''
Some Mother's Son, a film starring Helen Mirren. In 1999, she appeared in the film Agnes Browne as Winnie the Mackerel. In 2007, she appeared 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 began playing in the 1990's in the original
Mrs Browne, and subsequently the
BBC sitcom ''
Mrs. Brown's Boys since 2011. 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. Gibney and O'Carroll reprised their roles as the characters in the
Netflix film
A Madea Homecoming (2022).
Strictly Come Dancing In 2014, Gibney took part in the
twelfth series of
Strictly Come Dancing. She was partnered with Irish professional
Tristan MacManus. Gibney and MacManus were the second couple to be eliminated in week three of the competition after dancing to
ABBA's "
Mamma Mia" on Movie Week. She competed in the bottom two against
Blue star
Simon Webbe and his partner
Kristina Rihanoff. •
Note: Donny Osmond was a guest judge for the third week ==Personal life==