As of March 25th, Steven Spielberg is attached to direct this film. Spielberg himself is actually mentioned in the original novel by Ernest Cline that this film is based on. Spielberg has stated that he will be removing references of his movies.
The music score was originally going to be composed by longtime Steven Spielberg collaborator John Williams, however, due to scheduling conflicts working on another Spielberg film The Post (2017), he left and Alan Silvestri took over. This is only the third film where Spielberg isn't collaborating with Williams.
On August 11, 2015, a rumour began circulating that Steven Spielberg was "courting" Gene Wilder to play OASIS creator James Halliday, making Ready Player One the first film Wilder has done since 1999. However, Wilder guest starred as 'Elmer' on Yo Gabba Gabba.
Some controversy surrounded the film when Tye Sheridan was cast due to the fact that casting website CastIt.Com had advertised that this film was looking for unknown talent for the lead role. Several people sent in their audition videos in hopes of being cast as the casting call said "unknown talent". When news of Tye Sheridan's casting broke out less than a day after the casting campaign on CastIt had ended, the reaction of people who auditioned ranged from understanding that they likely wouldn't be picked as they were "unknown" to outraged by the fact that they had been lied to.
A passage from the novel Ready Player One describes Wade's obsession and "research" of Anorak's Almanac, Halliday's journal chock full of '80s references to books, movies, TV shows, music, and video games. One of the filmographies that Wade studied from the Almanac was Steven Spielberg's, who just so happens to be directing this film adaptation.
The trivia items below may give away important plot points.
Although Steven Spielberg has stated that many references to himself that are seen in the book have been removed from the film, he has confirmed that Wade will still have his custom DeLorean, which is a prominent element in the Spielberg-produced Back to the Future (1985).