After the events of Avengers: Infinity War left a huge cliffhanger hanging over fans' heads, the security surrounding ​the as-yet untitled Avengers 4 was bound to be much more stringent. However, star Karen Gillan—who plays the antihero Nebula, from Guardians of the Galaxy—has revealed just how strict things were on the set.

Now that filming for the movie has wrapped, ​Gillan was able to reveal the set's secret security measures. While on the ​Shoot This Now podcast, she explained, "We didn’t even get a script, there was no script. [I just got] my scenes. I’d sometimes get them just in the morning, do them, hand them back over at the end of the day."

"The directors would fill us in on everything that we needed in terms of context, but still, I don’t know what this movie’s about," Gillan added.

Not giving the actors the full script is a potentially risky move on the part of the Russo Brothers, the film's directors, as not having the rest of the narrative in mind could alter or deter their performances. However, the Russos have proven themselves adept at coaxing the best work out of their actors.

Another method they apparently used to keep things quiet was the incorporation of false scenes. Star Paul Bettany ​previously confirmed that, "We read scripts that were fake scripts and then they had fake twists and scenes that never were shot and you'd talk to the director and they'd say ‘All of that stuff at the end? Not happening.'"

Bettany's revelation was backed up by ​Spider-Man actor Tom Holland, who stated "I got the directors on the phone and they walked me through what were the fake scenes. They'd had three leaks already, so they'd written a script with lots of fake scenes. There were three Hero iPads that had the only real scripts on them.”

Something tells us those iPads could be worth a pretty penny.