This is the fourth movie that Mila Kunis and James Franco have co-starred. The previous films where Date Night (2009), Tar (2012) and Oz the Great and Powerful (2013).
There are a number of misplaced "items" in the movie. Olivia Wilde's character is supposed to be in Paris, but she can briefly be seen in the back seat of a car driving by the Bar Americano. One of the paintings in James Franco's studio is on display in Rome, but with a different signature. And the obvious one where the note Mila Kunis writes in the New York hotel is picked up by Olivia Wilde in Paris.
Jude Law and Naomi Watts were rumored to be cast in the movie in the early stages of production.
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