John Henry Alvin (November 24, 1948 – February 6, 2008) was an American cinematic artist and painter who illustrated many movie posters. Alvin created posters and key art for more than 135 films, beginning with the poster for Mel Brooks' Blazing Saddles (1974). His style of art became known as Alvinesque by friends and colleagues in the entertainment industry.

Alvin's work included the movie posters for E.T. the Extra-Terrestrial, Blade Runner, Gremlins, The Goonies, The Color Purple, The Little Mermaid, Batman Returns, Beauty and the Beast, Aladdin and The Lion King. He also created the anniversary posters for Star Wars.