George Clooney is reportedly in talks to star in the dark corporate comedy "Up in the Air."

Based on the 2001 novel by Walter Kirn, "Up in the Air" focuses on a professional downsizer whose true dream is the accumulation of a million frequent flier miles. The trades say that Jason Reitman ("Thank You For Smoking") adapted the book and will direct for Montecito Picture Co. and DreamWorks.

Depending on Clooney's commitment and availability, "Up in the Air" could be Reitman's directorial follow-up to his Oscar nominated work on "Juno." He most recently produced the horror-comedy "Jennifer's Body," written by Diablo Cody.

Most recently seen in "Leatherheads" and "Michael Clayton," Clooney has the Coen Brothers' "Burn After Reading" opening next month. He's also voicing the main character in Wes Anderson's upcoming "The Fantastic Mr. Fox." He's been attached to more than a half-dozen upcoming projects as actor, director or producer, so his specific calendar is notoriously hard to predict.