Henry Conyngham, 8th Marquess Conyngham

Henry Vivien Pierpont Conyngham, 8th Marquess Conyngham (born 25 May 1951), styled as Earl of Mount Charles from 1974–2009 and predominantly known as Henry Mountcharles, is an Anglo-Irish nobleman who holds titles in the Peerages of Ireland and the United Kingdom.

He is best known for the rock concerts which he organises at his home Slane Castle, and for his column in the Irish Daily Mirror under the byline "Lord Henry".

He was born into an aristocratic family of Ulster-Scots descent, the eldest son of The 7th Marquess Conyngham (1924–2009) by his wife, Eileen Wren Newsom. He attended Harrow School before studying at Harvard University.

Styled Viscount Slane until 1974 and Earl of Mount Charles from 1974 until 2009, he succeeded his father in the marquessate and other titles in 2009. However, in the Republic of Ireland frequently (and ) he remains referred to as 'Lord Mount Charles', his former courtesy title. He also inherited the UK peerage title Baron Minster, of Minster Abbey in the County of Kent, created in 1821 for his ancestor, the 1st Marquess, thereby giving the Marquesses Conyngham the automatic right to sit in the British House of Lords (until 1999).

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