Building anticipation for the fall thriller, Warner Bros. Pictures unveiled a new poster for "Gravity" on Thursday (August 29).

In the sci-fi flick, a medical engineer and an astronaut work together to survive after an accident leaves them adrift in space.

Written and directed by Alfonso Cuarón, the movie stars Sandra Bullock and George Clooney as the imperiled space walkers.

Check out the new poster, in which the hunky leading man looks terrified in his space helmet. "Gravity" hits theaters on October 4th.