The film begins principal photography on September 24.
McGregor's career has had some impressive high points over the past 18 months, including last year's Oscar-winning "Beginners," the much less-seen but equally moving indie "Perfect Sense" and the current TIFF buzzy entry "The Impossible," an emotionally hard-hitting disaster film about the 2004 tsunami, co-starring Naomi Watts.
Official synopsis, including details on McGregor's role:
AUGUST: OSAGE COUNTY tells the dark, hilarious and deeply touching story of the strong-willed women of the Weston family, whose lives have diverged until a family crisis brings them back to the Midwest house they grew up in, and to the dysfunctional woman who raised them. Letts’ play made its Broadway debut in December 2007 after premiering at Chicago’s legendary Steppenwolf Theatre earlier that year. It continued with a successful international run.
McGregor will play Bill Fordham, estranged husband of Barbara (Roberts) and son-in-law of pill-popping matriarch Violet Weston (Streep). A college professor, he left his wife for one of his students, but wants to be there for his family. His marriage is disintegrating and his patience is slowly running thin.