... on Best Picture winner BIRDMAN:
The movie was largely shot inside Broadway's St. James Theatre - Michael Keaton and the rest of the cast had to adapt to Alejandro González Iñárritu's rigorous shooting style, which required them to perform up to 15 pages of dialogue at a time while hitting precisely choreographed marks.
Given the unusual style of filming long takes, Edward Norton and Michael Keaton kept a running tally of flubs made by the actors. Emma Stone made the most mistakes; Zach Galifianakis made the fewest.
During the press conference in Riggan's dressing room, he says that he hasn't played Birdman since 1992. That's the same year Batman Returns (1992), the last Batman movie starring Michael Keaton, was released.
Michael Keaton said this movie was the most challenging he has ever done. He also said that the personality of his character Riggan is the most dissimilar to himself of any he has ever played.
According to Alejandro González Iñárritu, he had dinner with director Mike Nichols in New York two weeks before he began shooting the movie. Iñarritu told Nichols of his plan for how he was going to shoot the movie as one long take. Nichols predicted it would be a disaster because not having the ability to use cuts in editing would inhibit the opportunities for comedy. Inarritu said the meeting didn't deter him, but was instead helpful in raising his awareness level of the difficulty of what he was about to do.
The scene of Riggan running through Times Square in his underwear was filmed after midnight so that the amount of real bystanders caught on camera in the shot would be limited, and that the majority of people in frame are hired extras or crew members.
Edward Norton and Zach Galifianakis said they were fans of Michael Keaton and were excited to work with him on this movie. Norton listed Night Shift (1982), Mr. Mom (1983), and Beetlejuice (1988) as three of his favorite Keaton films he grew up on.
Alejandro González Iñárritu has stated that the original ending featured a cameo of Johnny Depp in Riggans room at the theater. Instead of a Birdman 3 poster, there was a Pirates of the Caribbean 5 poster sticked to the wall, and instead of the voice of Birdman being heard out of sight, it was the voice of Jack Sparrow saying "How the f**k did we end up here, mate?".