After a tumultuous casting process, director and writer Alfonso Cuarón has found an actor who’s brave enough to take on the male lead in his film Gravity. According to Coming Soon, George Clooney will star opposite fellow Oscar winner Sandra Bullock in the sci-fi film that’s gone through more actors than we can count!

Gravity will be a 3D tale that centers on a woman stranded on a space station after satellite debris slams into it and wipes out the rest of the crew.” Robert Downey Jr. was previously signed on to star in the film after the studio gave Cuaron the green light to direct the $80 million project. He was attached to the project through multiple female cast changes including Angelina Jolie and Natalie Portman before jumping ship in November.

Gravity is expected to begin production soon, but we wonder how this movie will fit in with Clooney’s other project The Ides of March. He will both direct and star in that feature, which is set to begin filming in February 2011. What will Cuaron do? We assume that he’ll accommodate Clooney’s schedule.

What do you think of Clooney taking over where Downey left off?