Directed by: Joss Whedon
Starring: Robert Downey Jr., Scarlett Johansson, Chris Evans, James Spader, Chris Hemsworth, Aaron Taylor-Johnson, Elizabeth Olsen
Revealing mistake: When Captain America is fighting Ultron in the truck, for a brief moment you can see a safety line holding actor Chris Evans as he's hanging on the side of the cab of the truck.
Revealing mistake: At the very last (pre-credits) scene of the movie, as all the avengers are assembling, Scarlet Witch flies in, but it's not Elizabeth Olsen but a stunt double.
Continuity mistake: SPOILER - The wounds on Pietro's body change. The most noticeable one is on his right shoulder. The amount of blood decreases too.
Trivia: When Tony Stark is choosing FRIDAY as his AI companion, there's a card labeled JOCASTA. Jocasta, in the comics, is a robot, member of Avengers, and was created by Ultron. (01:36:55)
Question: Why is the Hulkbuster armour called Veronica?
Chosen answer: This is a fairly US-centric gag. In Archie comics, the titular Archie has two competing love interests: Betty and Veronica. Given the Hulk/Banner's history with Betty Ross being able to calm him down, Tony Stark has named the containment system/Hulkbuster armor "Veronica".