Sandra Bullock made a stunning solo arrival in a Narciso Rodriguez dress at the premiere of Gravity at the Toronto International Film Festival on Sunday night. While she wasn't joined by her costar George Clooney, she schmoozed with director Alfonso Cuarón on the red carpet and also made time to snap photos with waiting fans before hitting the stage at the screening. Sandra's stop in Canada is just the latest on her press tour to promote the space drama, which is already garnering award season buzz. She and George brought the film — and their palpable chemistry — to the Venice Film Festival late last month, and before that, Sandra was on hand to talk up the thriller at Comic-Con. Both stars bring charismatic performances to the film as astronauts who become stranded in space when their shuttle is damaged — don't forget to check out the intense trailer for the movie before its Oct. 4 release.