Even Thanos actor Josh Brolin didn’t know which Marvel Cinematic Universe heroes would turn to dust at the end of Avengers: Infinity War -- at least until he watched the blockbuster.

He told USA Today he had no idea about the film's final death toll until Infinity War's world premiere, where he sat beside co-star Chris Hemsworth, who had similarly been kept in the dark.

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When coupled with Elizabeth Olsen’s recent admission that she and several other actors were only told their fates in a van on the way to the film's set, we begin to get a good idea of how far directors Joe and Anthony Russo went to ensure secrecy.

“I was literally sitting in the theater going, ‘Oh my God. Oh my God. Spider-Man just disintegrated. That’s not OK," Brolin said. "I looked at Hemsworth and he looked at me. He smiled and was like, ‘Your career is over.’”

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Brolin seems to be taking his role in the destruction of half the MCU in stride. “On Instagram people are posting things like, ‘I hate you,’” he said. “That’s fantastic. I’m, like, the one guy who smiles when he sees that. It’s like, ‘It worked.’”

Now in theaters, Avengers: Infinity War is directed by Joe and Anthony Russo and stars Robert Downey Jr, Chris Evans, Chris Hemsworth, Scarlett Johansson, Mark Ruffalo, Paul Bettany, Don Cheadle, Anthony Mackie, Elizabeth Olsen, Chadwick Boseman, Benedict Cumberbatch, Tom Holland, Chris Pratt, Zoe Saldana, Bradley Cooper, Vin Diesel, Pom Klemtieff, Dave Bautista, Karen Gillan, Tom Hiddleston, and Josh Brolin.