The crowd voices during the disk battle in the beginning of the movie are actually the voices of the audience during the panel for the film at the 2010 San Diego Comic-Con. The audience was instructed to stomp and chant to prompts shown on the large video screen, and the sound was recorded by techs from Skywalker Sound.
Daft Punk were huge fans of the original film and readily agreed to be the composers. Director Joseph Kosinski said he was interviewing them about the job, he felt that he was the one being interviewed, such was their desire to make sure he preserved the spirit of the first movie.
Early drafts of the script did not feature the role of Alan Bradley. It was only after public outcry by Bruce Boxleitner and fans of the original film that Bradley was added to the script. Boxleitner's performance proved so popular, he went on to make public appearances as Alan Bradley to promote the film, and returned to play the role of Tron in Tron: Uprising (2012).
In an interview, Jeff Bridges noted that as he was being scanned by laser into a computer (for CGI effects), he realized the same thing happened to him (fictionally) in the original ट्रॉन (1982).
The suits worn by the actors proved to be problematic on set. Every single one of them was fitted with a small lithium battery that powered the circuitry for the embedded light strips, but each battery only lasted 12 minutes. In order to maximize the output, the light strips had to be switched on right before each take and turned off immediately afterwards. The circuitries inside the suits were also very fragile, so the actors could not simply sit between takes but had to recline against upright boards.
Daft Punk: In addition to the soundtrack, the duo are spinning the tunes at the End of Line Club with their trademark helmets.
Cillian Murphy: Uncredited, as Edward Dillinger Jr., the head of ENCOM's software design team, and the son of former ENCOM Senior Executive Ed Dillinger, portrayed by David Warner in ट्रॉन (1982).
Steven Lisberger: producer of the film and director of the original ट्रॉन (1982) as the End of Line Club bartender.