“Day One…” the Russo Brothers wrote on Instagram with a photo of a chair that reads, “Victor Von Doom.” The chair is in the spirit of the Doomsday casting announcement, which was also done by showing the actors’ names on a chair. The chair of Victor Von Doom belongs to Robert Downey Jr., who will play Doctor Doom in the next two Avengers movies.

Filming on "Avengers: Doomsday" has officially begun. Anthony and Joe Russo let the world know through social media that principal photography on the next big Marvel event film had started. The pair posted a picture of Robert Downey Jr.'s actor's chair from the set, reading simply "Victor Von Doom". You can see the post yourself below.