Antoine-Olivier Berthelet (May 25, 1798 – September 25, 1872) was a businessman, philanthropist and political figure in Lower Canada.
Berthelet is remembered particularly for having directed William Gillette - noted as the definitive early Sherlock Holmes - in his only filmed performance as the great detective - and controversial feminist Mary MacLane in her silent movie Men Who Have Made Love to Me.
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Arthur Berthelet (1879–1949) was an American movie director who went from directing stage plays (several on Broadway) to directing silent movies.