Spike Jonze’s upcoming follow-up to Where the Wild Things Are doesn’t yet have a title, but it has a cast in place. Or, at least, it did. A while back we reported that Jonze’s next film was going to be about a man who falls in love with a computer voice, a sort of forward looking commentary on the dangers of developing a Siri fetish. Joaquin Phoenix was already on board as the male lead, and Carey Mulligan, Amy Adams, and Samantha Morton were negotiating to come on in other capacities. The negotiations stuck, because all three ladies became official members of the cast. But now that’s changed. According to Variety, Mulligan has been forced to drop out of the film due to scheduling conflicts. All is not lost, however. Signing up Adams and Morton is still a pretty good haul in and of itself, and there’s word that Jonze is in final negotiations to recruit a more than acceptable replacement for Mulligan.