Aislín McGuckin (born 1974) is a Northern-Irish actress. McGuckin was born in Newry, County Down, Northern Ireland. Since 2004 Aislin McGuckin is married to Aidan McArdle. She is best known from her role as Dr. Liz Merrick in Heartbeat and being one of the two doctors to survive alive. She has appeared also in theater and various minor roles in TV and movies including The Nephew and The White Countess.