- Journalist and writer turned television personality. Had a very bad stutter which became his trademark.
- In his autobiography (and several interviews), he claimed he "could never quite get the hang of writing scripts"; nonetheless, he wrote ten films and a great deal of television (often in collaboration with his third wife, Vivienne Knight).
- Was the third Baron Glenavy.
- His father was James Henry Mussen Campbell, a lawyer who was Ireland's Solicitor General, Attorney General, Lord Chief Justice, and Lord Chancellor before becoming the first chairman of the Senate of the Irish Free State.
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