Simon-Joseph-Alexandre-Clément Denis (14 April 1755 in Antwerp – 1 January 1813 in Naples) was a Flemish painter active primarily in Italy.
Denis first studied in his native city of Antwerp, with the landscape and animal painter H.-J.
He lived in Paris for ten years where he gained the patronage of genre painter and art dealer Jean-Baptiste-Pierre Lebrun, whose support allowed him to move to Rome in 1786.
He also developed ties within the French artistic community; Élisabeth-Louise Vigée-Le Brun stayed with him for some days in 1789 and that same year he and she traveled with François-Guillaume Ménageot to visit Tivoli.
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