Sandra Bullock In Talks For Gravity

Variety reports Sandra Bullock is now in talks for the lead in Alfonso Cuarón's Gravity. Recently Natalie Portman officially passed on the movie after an offer had gone out to her. While I'm unsure of Bullock in a science fiction film Cuarón is talented enough for me not to care about casting. Robert Downey Jr. is attached to co-star but I assume could leave to focus on other projects.