Henri Chrétien (February 1, 1879 – February 6, 1956) was a French astronomer and an inventor.

Born in Paris, France, his most famous invention is the anamorphic widescreen process, that resulted in CinemaScope, and the co-invention (with George Willis Ritchey) of the Ritchey-Chrétien type of astronomical telescope.

He spent part of his early astronomical career at the Nice Observatory.

The astronomical Chrétien International Research Grants awards are in honor of him. A crater on the Moon (Chrétien crater) is named in his honor.de:Henri Chrétien

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