Sean O'Callaghan
- Known for
- Acting
- Born
- January 26, 1954
- Place of birth
- Tralee, County Kerry, Ireland
- Died
- August 23, 2017
Biography
Sean O'Callaghan was a member of the Provisional Irish Republican Army, who from the late 1970s to the mid-1980s worked against the organisation from within as a mole for the Irish Government with the Garda Síochána's Special Branch.