There have been many names attached to Alfonso Cuarón's latest film, 'Gravity,' but one name many will be happy to hear is George Clooney who will be joining the sci-fi adventure. Deadline confirmed that Clooney will be replacing Robert Downey Jr., who had to duck out of the project due to a schedule conflict. Clooney and Sandra Bullock will play the sole survivors of a space station crash.

Cuarón's 3D feature will begin production in late April or early May, allowing Bullock time to finish her other Warner Bros. film, 'Extremely Loud and Incredibly Close,' which also stars Tom Hanks and newbie Thomas Horn. Her character will be in the spotlight, alone, for most of 'Gravity,' with the goal of returning home to her young daughter fueling her fight for survival. Clooney takes on the role of the space station team leader who also manages to dodge the wrath of an exploded asteroid that destroys the site both characters are working on.

This isn't Clooney's first trip beyond the stars -- the actor spent time investigating the troubled crew of a space station in Steven Soderbergh's 2002 film 'Solaris.' Now that we finally have our leads, will 'Gravity' prove to be a worthy follow up to Cuarón's last sci-fi thriller, 'Children of Men?'