Behind-The-Scenes Facts From 'Avengers: Age Of Ultron' That Demand A Rewatch

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Vote up the facts that made you say, 'Whoa.'

The Marvel Cinematic Universe began in 2008 with Iron Man, and for the next few years, it seemed as if Marvel Studios was trying things out to see what worked. Gradually, the studio built up enough characters for a movie featuring all of them, and in 2012, Marvel's The Avengers hit theaters to widespread critical acclaim. The MCU proved it could be done - a single movie featuring six major stars playing incredibly important characters could work, and it made the studio a lot of money.

The Avengers exceeded all expectations, helping make the MCU into the most successful film franchise of all time. It wasn't long before the studio began development of a sequel, and a few years after the first movie was released, audiences around the world were treated to Avengers: Age of Ultron. Like any offering from the MCU, Age of Ultron has been scrutinized by the fans, but there's always something new to learn about Earth's Mightiest Heroes and some of the impressive battle scenes they've been in over the years.

That's especially true when you're looking at some of the things that happened behind the scenes. Age of Ultron certainly had a lot going on that wasn't revealed until much later, and when you find out what those things were, you're going to want to go back and rewatch it. This list compiles some of the most fascinating behind-the-scenes facts from Age of Ultron that'll make you want to sit through it all over again! Take a look down below, and don't forget to upvote your favorites before you head back to the couch to chill with Earth's Mightiest Heroes for a couple of hours.

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    104 VOTES

    Andy Serkis Did Far More Than Play Ulysses Klaue

    Andy Serkis may have landed the role of Ulysses Klaue thanks to a random fan's suggestion online, but playing the character was only part of what he did in the movie. Serkis is arguably the most talented and experienced motion capture actor working in Hollywood, having brought to life numerous important characters, including King Kong, Supreme Leader Snoke, and Gollum, to name a few. It was his capacity as a motion capture artist that first brought him to the set of Age of Ultron.

    Most of his work happened behind the cameras (or in front of it, but you'd never know it). He was instrumental in teaching other actors how to move properly while wearing motion capture suits and heavy equipment. This included the Hulk and Ultron, played by Mark Ruffalo and James Spader, respectively. With his motion capture production company, The Imaginarium, he devised new techniques used for the first time in the film, which helped bring the digital characters to life in a believable way.

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    71 VOTES

    Stan 'The Man' Lee's Favorite Cameo Is In 'Age of Ultron'

    Stan "The Man" Lee was one of the earliest creators working at the House of Ideas, even before Marvel Comics was called Marvel Comics. He worked primarily as a writer and editor, but he also helped co-create most of Marvel Comics' Silver Age characters, including several depicted in the film. He's also been appearing in short cameos for decades, which started long before the Marvel Cinematic Universe was a thing.

    His first cameo came in 1989's made-for-TV movie, The Trial of the Incredible Hulk. He must have caught the acting bug because he appeared in dozens of films and television series, most of which didn't require him to speak. That changed with the MCU, and of all the cameos he had in the franchise, the one in Age of Ultron was his favorite. In the movie, he plays a WWII veteran who boasts that he can drink Thor under the table. He can't, and when he's helped out of the party, he slurs Lee's favorite word, "Excelsior!"

    Lee was a WWII veteran, so he wasn't really playing a part so much as he was playing himself. He also appeared in two scenes in the movie, which was a first for him. The first scene sees him challenging Thor and the second has him being taken out of the building. It was the ability to show up in more than one scene that made it his favorite.

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    86 VOTES

    A Lot Of Detail Went Into The Hulkbuster Armor

    Tony Stark's Hulkbuster armor made its cinematic debut in Avengers: Age of Ultron and a lot of thought went into making the design look right. One of the biggest differences between the armor and the suit Tony wears underneath is the power required to make it work. If you look closely, you will see that the Hulkbuster armor has an Arc Reactor on the chest, one on each knee, and four on the back.

    To get the suit to work, Tony has to wear his Iron Man armor with its Arc Reactor and marry its power up to a suit that has seven of its own, which means the gargantuan armored suit requires eight times the power a standard set of armor requires. In addition, it is believed that additional Arc Reactors are hidden within the suit for a grand total of 11.

    Another interesting tidbit about the Hulkbuster is its name - or rather, the name of the satellite that deploys it. It's called "Veronica," which is a reference to the Archie comics. In those books, Archie dates two women, Betty and Veronica. Since Bruce Banner has a history with Elizabeth "Betty" Ross, her adversary would almost have to be named Veronica.

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    65 VOTES

    Scarlett Johansson Worked With Three Stuntwomen To Hide Her Pregnancy

    Scarlett Johansson was pregnant while filming Avengers: Age of Ultron, so the crew got to work making sure they could hide the pregnancy. Amazingly, they didn't need to trim any scenes, and that was largely due to the work of three stuntwomen who worked on the film. After all, pregnancies may be hidden easily enough on a sitcom, but this was an action movie.

    Director Joss Whedon explained the situation in an interview with Entertainment Weekly: "She's not going to spend the whole movie carrying groceries. We didn't trim any scenes. We're like, 'We'll make it work.'"

    The stuntwomen wore dotted maps on their faces, so the VFX artists could digitally map Johansson's face onto theirs. It was all done in post-production, and nobody watching the movie could tell. Chris Evans joked about how much the women looked like the actor, saying, "It's always funny. You walk by, 'Hey, Scarlett - oh, weird. You're not Scarlett at all. Sorry.' A lot of fake Scarletts around."

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    51 VOTES

    Andy Serkis Was Cast To Play Klaue Because Of A Fan

    When Joss Whedon was putting the story together, he knew he would lean heavily on Vibranium as a plot point. Because Vibranium can only be found in Wakanda, the African nation was a big part of the script. Eventually, they moved further away from that concept until it got to the point of Whedon referring to it as "Wakinda," and a decision was made to cut it altogether. One thing that made it through was the role of Ulysses Klaue, the arms dealer who sources the Vibranium Ultron needs to become stronger.

    That role went to Andy Serkis, and as Whedon explains in the DVD commentary, he got the gig because of a fan:

    When we thought of it, Jeremy [Latcham] went through and looked at images of Klaue online. Some fan had put out Andy Serkis as Klaue and, obviously, we were already working with Andy. He and his Imaginarium were guiding Mark [Ruffalo] and James [Spader] in their movement.

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    44 VOTES

    For Joss Whedon, James Spader Was The Only Option For Ultron

    Looking back, it's hard to imagine an actor other than James Spader in the role of Ultron. His voice carried the character and oddly humanized the android. Of course, the talented actor didn't stop at giving Ultron his voice; he also provided the mo-cap work to bring him to life. Joss Whedon explained his actor's vocal talents, saying Spader has a "hypnotic voice that can be eerily calm and compelling while also being very human and humorous." Whedon never even considered another actor for the role.

    Evidently, the mo-cap work was a bit tough on Spader, who couldn't wear his glasses during filming. He had lights shining into his eyes, and he had to pretend to be an 8-foot-tall robot. Whedon further explained that Spader had to jump into that suit the second day he was on the set of Age of Ultron. He even managed a good imitation of the actor's mellifluous voice in describing Spader's final time in mo-cap, saying, "Thank you for the weirdest day of my life. That was tremendous fun."