Scarlett Johansson was in the hot seat during her Monday appearance on The Tonight Show Starring Jimmy Fallon, where the show host pulled out all the stops to make her spill on some closely guarded Marvel secrets.

While the Oscar winner managed to dodge Jimmy Fallon‘s pressure campaign about what happens in her upcoming movie, Black Widow, she did relent on one thing: The franchise will finally address a mystery that was introduced all the way back in the first Avengers movie.

“You finally get to know what happens in Budapest,” Johansson dished.  For Marvel fans, the Budapest Operation was first mentioned in 2012’s The Avengers, when Johansson’s Black Widow and Jeremy Renner‘s Hawkeye discuss the super-secret mission only in passing. The mission remained a secret during Monday’s interview, with Johansson admittedly too scared to go further into detail about it, remarking to Fallon, “I can’t! I can’t say anything!”

Johansson also acknowledged that Black Widow is something Marvel fans have demanded for nearly a decade.

“I’m nervous about it — it’s like a nervous excitement,” Johansson said. “We’ve been sitting on this film for over a year and it’s been ten years in the making.”

Johansson said she’s “super proud” of the film, adding, “It really is a great movie to see in the theater because it’s super cinematic, explosive, loud, fun… passionate.  It’s really great.  It’s explosive!”

Black Widow arrives in theaters and will be available to watch to Disney+ subscribers with Premiere Access for an additional fee on July 9.

Marvel is owned by Disney, the parent company of ABC News.

Copyright © 2021, ABC Audio. All rights reserved.