Judy was born in Ireland and raised in London before moving back to Ireland in her early teens. Growing up between both countries allows her to move effortlessly between a range of British and Irish accents.

She is best known for her recurring role in the hit Irish comedy series The Young Offenders, appearing in both Season 1 and Season 2. She has also featured in supporting roles in major international productions, including the feature film The Duchess and the television series Mrs. Davis.