Joseph Mary Plunkett (21 November 1887 – 4 May 1916) was a member of the Irish Republican Brotherhood Military Committee. He held a prominent role in the organisation of the 1916 Easter Rising and was a signatory of the Irish Proclamation. Plunkett was very unwell during the events of the Rising having had an operation on his neck glands just days before. His aide de camp was Michael Collins. He faced arrest in the aftermath of the Easter Rising and was sentenced to be shot. In the hours before his death, he married Grace Gifford while imprisoned. He was executed by firing squad on 4 May 1916.