Derry Girls cast members, including Nicola Coughlan, Saoirse-Monica Jackson, Louisa Harland, Jamie-Lee O'Donnell, and Dylan Llewellyn, have thriving acting careers. Keeping up with the Derry Girls cast nowDerry Girls was created by Irish screenwriter Lisa McGee, who drew from her experiences growing up in Northern Ireland. Saoirse-Monica Jackson (Erin Quinn)Saoirse-Monica Jackson attends the launch of Derry Girls 3 on April 7, 2022, in Derry, Northern Ireland. Derry Girls cast at the "Derry Girls" photocall on 14 April 2019 in London, England. Most of the Derry Girls cast are Irish and Northern Irish, except Dylan Llewellyn, who is English, like his character James.