Seán O'Casey (born John Casey, 30 March 1880 – 18 September 1964) was an Irish dramatist and memoirist. A committed socialist, he was the first Irish playwright of note to write about the Dublin working classes.

O'Casey was born in Dublin, Ireland, as John Casey or John Cassidy to Michael and Susan Archer Casey in a house at 85 Upper Dorset Str ...