Henry Vivien Pierpont Conyngham, 8th Marquess Conyngham, styled Viscount Slane until 1974 then Earl of Mount Charles from 1974 until 2009 and predominantly known as Lord Henry Mountcharles, was an Anglo-Irish aristocrat who was best known for the Slane Festival rock concerts that he organised at his stately home Slane Castle, and for his column in the Irish Daily Mirror under the byline "Lord Henry".
- Occupation
- journalist, aristocrat
- Citizenship
- United Kingdom, Ireland
- Born
- May 25, 1951
- Died
- June 18, 2025
