The new Hulu miniseries is based on the acclaimed Joseph Heller novel and "follows the adventures and misadventures of a US air squadron in Italy in World War II," according to the online streamer.
George looked notable thin as he wore an all-black suit to the premiere. He also kept his left hand completely hidden in his pocket the entire time.
Check out this RadarOnline.com gallery for more on George's medical crisis, and the latest on the state of his marriage.
George struggled to smile as cameras flashed all around him.
As Radar recently revealed, The Oceans 11 star once suffered a major health crisis during his teenage years: Bells' Palsy.
During a talk on The Hollywood Reporter's "Awards Chatter" podcast, the 58-year-old recalled one day when he was having lunch with his family after church and his tongue and jaw went numb.
He tried to drink milk and couldn't. It spilled out of his mouth because his face was completely paralyzed.
He said his face remained motionless "for six or seven months."
The Clooneys' troubled marriage has continued on, even after years of rumored troubles in paradise.
Radar reported bumps in the road as early as April 2017, when it was revealed the couple were sleeping in separate bedrooms.
Just last year, sources told Radar the Clooney's were in the midst of some major marital drama.
Despite their differences, the pair looked like a perfect couple at the National Museum of Scotland on March 14, when the two were honored for their humanitarian work at the People's Postcode Lottery Gala.