Alien( 1979).

History Photographed on Instagram: "Behind the scenes of Alien 3, director David Fincher explored a truly unique special effects concept to bring the new Xenomorph to life.⁠ ⁠ His team designed a full-body latex costume for a Whippet dog, aiming to capture the creature's feral, quadrupedal movements.⁠ ⁠ The ambitious idea was ultimately scrapped when it became clear the dog's adorable demeanor made the terrifying monster look, in their words, "comical.""