POPSUGAR Entertainment George Clooney George Clooney to Star in Gravity With Sandra Bullock George Clooney Replaces Robert Downey Jr., Boards Gravity by Entertainment 12/16/10 4 Shares Like us on Facebook Breaking casting news! The sci-fi film Gravity, which has already played musical chairs with its leading ladies (Sandra Bullock is now finally locked in to star), is swapping its leading man as well. Though Robert Downey Jr. was originally signed on as the film's main guy, the latest word is that George Clooney will be taking his place in the movie. Hey, if you can't have your first pick, Clooney is definitely an excellent second option! Source: WireImage Read More GravityMovie NewsGeorge ClooneyMovies George Clooney POP 100: Who Is Your Favorite A-List Star? George Clooney Is "Very Proud" to Be Married to a "Very Strong" Woman Amal Clooney Is a Real-Life Disney Princess Amal and George Clooney Make Yet Another Showstopping Red Carpet Appearance Get the scoop with our daily newsletter Movies Young Hollywood A-Listers TV Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR. 4 years I'm sure he'll be great in this movie.