Avengers: Age of Ultron ($365 million)
The Avengers is the most successful movie series of all time, and Age of Ultron is the second most successful of the 4 that have been released. This movie had an insanely high starting budget, but they then pushed it close to $50 million over, due to post-production rushing from Marvel at the time. The cast and crew that worked on this movie spanned over 7 countries and 4 continents of shooting, and in addition to that, 3,000 visual effects shots were utilized in post-production. Despite its enormous, risky budget, this movie grossed over $1.4 billion worldwide, cementing it as the 5th highest-grossing movie of all time.
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