On Katie is an Irish actress with bases in both Dublin and Birmingham. She trained at the Royal Birmingham Conservatoire, and graduated prior to that with a BA Honours Degree in English and Drama from Trinity College Dublin. She has also trained at the Lyric Drama Studio and National Youth Theatre.

Katie most recently performed in La Ronde by Arthur Schnitzler at The Crescent Theatre, Birmingham.

Katie is highly skilled in multiple dance genres, including modern, tap, jazz, and Irish dance. She has achieved grade 8 in piano from the London College of Music and plays Irish traditional fiddle.

Katie has an APC distinction in unarmed combat and a pass in single sword.