Below is a list of the characters from the play Philadelphia, Here I Come! along with a cast list from when it was first performed, at the Gaiety Theatre, Dublin, on September 28, 1964.[1]
- Public Gareth (Gar) O'Donnell – Patrick Bedford
- Private Gareth (Gar) O'Donnell – Donal Donnelly
- S.B. "Screwballs" O'Donnell – Eamonn Kelly
- Madge Mulhern – Mairín D. O'Sullivan
- Kate Doogan (later Kate King) – Máire Hastings
- Senator Doogan – Cecil Barror
- Lizzie Sweeney (gars auntie)
- Con Sweeney – Tom Irwin
- Ben Burton – Michael Mara
- Ned – Eamon Morrissey
- Tom – Brendan O'Sullivan
- Joe – Emmet Bergin
- Canon Mick O'Byrne – Alex McDonald
