Actors
- Orla O'Rourke (2 movies)
- Orla Tobin (1 movie)
- Orlaith Macqueen (1 movie)
- Orlando Seale (1 movie)
- Orson Welles (2 movies)
- Oscar Isaac (1 movie)
- Oskar Ricketts (1 movie)
- Oskar Werner (1 movie)
- Otto Gebühr (1 movie)
- Otto Heinzle (1 movie)
- Otto Schmöle (1 movie)
- Owen McDonnell (2 movies)
- Owen Roe (5 movies)
- Owen Sharpe (1 movie)
- Owen Sullivan (1 movie)
- Owen Wilson (1 movie)
- Packy Lee (1 movie)
- Paddy C Courtney (1 movie)
- Paddy Considine (1 movie)
- Paddy Curran (1 movie)
- Paddy Dunne Cullinan (1 movie)
- Paddy Houlihan (1 movie)
- Paddy Looney (1 movie)
- Paddy O'Donnell (1 movie)
- Padraic Delaney (4 movies)
- Pádraig J. Dunne (1 movie)
- Padraig O'Loinsigh (1 movie)
- Paloma Baeza (1 movie)
- Pamela Franklin (1 movie)
- Paraic Breathnach (1 movie)
- Parker Posey (1 movie)
- Parminder Nagra (1 movie)
- Pascale Montpetit (1 movie)
- Pat Ennis (1 movie)
- Pat Kinevane (1 movie)
- Pat Laffan (4 movies)
- Pat Leonard (1 movie)
- Pat McCabe (1 movie)
- Pat Shields (1 movie)
- Pat Shortt (4 movies)
- Pat ‘The Chief’ O’Donnell (1 movie)
- Patricia Routledge (1 movie)
- Patricia Smith (1 movie)
- Patrick Bergin (6 movies)
- Patrick Fitzsymons (1 movie)
- Patrick Gardiner (2 movies)
- Patrick Magee (4 movies)
- Patrick Malahide (2 movies)
- Patrick McGoohan (2 movies)
- Patrick Mölleken (1 movie)