Answer
The answer is Alien, Ridley Scott's 1979 sci-fi horror classic. In the film, Stanton, played by John Hurt, falls victim to a facehugger, a parasitic creature from another planet, while investigating a distress signal on a desolate moon. The facehugger implants an egg in his stomach which eventually bursts open, giving birth to a terrifying creature called a xenomorph, leading to his demise.