Bolanji Badejo, 7 ft tall, in his custom-fit suit for playing the Alien. He only appears when you can see her full body. I first saw the test footage two days ago. 

“The idea was that the creature was supposed to be graceful as well as vicious, requiring slow, deliberate movements. But there was some action I had to do pretty quick. I remember having to kick Yaphet Kotto, throw him against the wall, and rush up to him. Veronica Cartwright was really terrified. After I fling Yaphet Kotto back with my tail, I turn to go after her, there’s blood in my mouth, and she was incredible. It wasn’t acting. She was scared.” (Source)

(via rookiemag)