Though there are plenty of voice cameos in IF, the credits revealing Brad Pitt as Keith is a surprising secret. John Krasinski’s 2024 live-action/CGI hybrid movie about imaginary friends features plenty of A-list talent. Whether it is Ryan Reynolds leading the way or the likes of Steve Carell or Phoebe Waller-Bridge being part of IF‘s voice cast, the credits for the film are loaded with recognizable names. This is at least partially due to Krasinski and Reynolds pulling in favors from other people they have worked with over the years.