The Hangover Star, Zach Galifianakis has been hiding from the prying eye of the public for more than a year, and now we know why.

New & Improved Zach

The actor showed his significant weight loss and his new and improved self as he attended the premiere of his new project “Birdman (or The Unexpected Virtue of Ignorance)” at the closing of the New York Film Festival on Sunday.

The 45-year-old comedian looked slimmer than ever wearing his grey suit with fine blue checks, matching pale blue shirt, navy tie, and of course, his signature messy-looking beard.

Actually, this isn’t the first time Zach has unexpectedly lost some weight.

Back in early 2013 he lost several pounds when he decided to stop drinking alcohol.

Birdman

His latest hit comedy drama film “Birdman” focuses on a washed-up actor called Riggan Thomson, played by Michael Keaton, “who once played an iconic superhero and must overcome his ego and family trouble as he mounts a Broadway play in a bid to reclaim his past glory.”

Naomi Watts plays the protagonist’s girlfriend, Lesley, a nervous actress in the play while Zach plays Jake, the play’s producer. Edward Norton and Emma Stone are also starring in this awesome dark comedy.