Bill Paxton and Glenne Headly, who played the parents of Mae, both died the year of the film's release. Paxton died two months prior to the film's release on February 25 due to complications from heart surgery, and Headly died of a pulmonary embolism on June 8, less than two months after the film's release.
Re-shoots took place four months before release, aimed at making Emma Watson's character more appealing, but test audience reactions were even worse than previous test screenings.
The scene where Annie video calls Mae was shot by Karen Gillan's crew while they were filming Gillan's feature film; The Party's Just Beginning (2018) in Scotland.
The logo of The Circle was created before the Uber redesign, despite them looking very similar.
The Circle's HQ looks very similar to Apple's new campus "Apple Park" which was scheduled to open shortly after the film's premiere.