The Blob is a 1958 American independent science fiction horror film directed by Irvin Yeaworth and written by Kay Linaker and Theodore Simonson. It stars Steve McQueen and Aneta Corsaut and co-stars Earl Rowe and Olin Howland. It was distributed by Paramount Pictures as a double feature with I Married a Monster from Outer Space.

Science fiction is a film genre that uses speculative, fictional science-based depictions of phenomena that are not fully accepted by mainstream science, such as extraterrestrial lifeforms, spacecraft, robots, cyborgs, mutants, interstellar travel, time travel, or other technologies. Science fiction films have often been used to focus on political or social issues, and to explore philosophical issues like the human condition.