Rosey is a Dublin based actor originally from Kilkenny. She has a BA Honours Degree in Performing Arts and has trained extensively with David Scott, Helena Walsh, and Benjamin Mathes.

Notable roles include Mairead in the sold-out Bench Tales for Barnstorm Theatre Company as part of the Kilkenny Arts Festival, Kelli in Barnstorm Theatre Company's lunchtime theatre production Commencing, and Emma O'Connor, the female lead in Sau Dachi's award winning feature film Suit Hung. Tied Tongue.
She has also toured nationally with Cyclone Rep Theatre Company’s Hamlet: Cybermadness, where she played Gertrude, Horatio, and Rosencrantz. Other credits include a month-long run at the Pleasance Theatre during the Edinburgh Fringe Festival in One More, a comedy by No Filters Productions, as well as recent roles in Ciaran Creagh's feature film Samanta Nobody and the TV show Bloodline Detectives for Peninsula Television.

Rosey is a strong singer and an experience horse rider. She is currently training with Screen Combat Ireland, undertaking action performance and martial arts training for Stage and Screen.