Ian Malcolm is one of the protagonists of the Jurassic Park franchise, serving as the protagonist of the novel duology and a major character in the film series. He is a mathematician at the Santa Fe Institute who specializes in chaos theory.
In the books, he serves as the tritagonist of Jurassic Park and the protagonist of The Lost World. In the movies, he serves as the tritagonist of Jurassic Park, the protagonist of The Lost World: Jurassic Park, a minor character in Jurassic World: Fallen Kingdom and one of the protagonists of Jurassic World: Dominion.
He is portrayed by Jeff Goldblum.