Marvel’s current superhero movie franchise could have looked a lot different if things had worked out the way they were originally supposed to. Before Scarlett Johansson was cast as The Black Widow in Iron Man 2, the role was originally actress Emily Blunt’s for the taking. She reportedly was forced to turn it down because of scheduling conflicts, and in 2009 she commented that “it’s a shame the two of them couldn’t work together.”

In 2012, after it was reported that she also turned down the role of Peggy Carter in Captain America: The First Avenger, Blunt told Vulture: “Usually the female parts in a superhero film feel thankless: She's the pill girlfriend while the guys are whizzing around saving the world…I didn't do the other ones because the part wasn't very good or the timing wasn't right, but I'm open to any kind of genre if the part is great and fun and different and a challenge in some way.”