Saoirse-Monica Jackson is a Northern Irish actress. She portrayed Erin Quinn on the Channel 4 Irish sitcom Derry Girls from 2018 to 2022 and Cheryl Crawford in the BBC Liverpool gangster series This City Is Ours (2025).

Jackson was born in Derry, Northern Ireland, on 24 November 1993. She split her time growing up in Derry and Greencastle, County Donegal, where her parents ran a village pub. After obtaining GCSEs and A-Levels at St Cecilia's College in Derry, she trained in acting at the Arden School of Theatre in Manchester Jackson's television debut came in 2016 when she landed the role of Sasha in Harlan Coben's The Five, appearing in four episodes.