These Marvel movies are so damn secretive, even their stars don’t know whether they’re in them or not.

Take Mark Ruffalo, aka the Incredible Hulk. Ruffalo’s name was left out of the official synopsis and cast list for next spring’s Captain America: Civil War. But Robert Downey Jr. (who is definitely in the movie) claims Ruffalo’s in it. Which was news to Ruffalo; he told HitFix he had no idea he was showing up in Civil War until Downey said so:

If Robert Downey, Jr. says I’m in Captain America, I’m in Captain America dammit! And I will wait for the day that my call sheet shows up at my doorstep or my script. At this point, I’m told that I’m in it by Robert, which I’ll take as biblical, but I just haven’t heard or seen from production yet.

This isn’t the first time the Civil War cast list has caused some confusion. Samuel L. Jackson already stated publicly he was surprised he wasn’t in Captain America: Civil War, and admitted he “[doesn’t] know what’s going on” with Nick Fury anymore. Now Mark Ruffalo is surprised to learn he is joining the film (along with confirmed actors like Chris Evans, Scarlett Johansson, Sebastian Stan, Anthony Mackie, Chadwick Boseman, Emily VanCamp, Elizabeth Olsen, Paul Bettany, Don Cheadle, William Hurt, and Paul Rudd). Frankly there’s barely any room for Ruffalo, especially if he plans on turning into the Hulk during the film. That guy takes up a lot of space on the Quinjet.

With or without Mark Ruffalo, Captain America: Civil War opens in theaters on May 6, 2016.