Tom Holland says Mark Ruffalo is a bigger culprit of spoiling Marvel Cinematic Universe movies than he is. As Marvel Studios' shared universe has grown in popularity, so to has the number of people it employs - and how many individuals call themselves fans. Marvel has largely done a good job of keeping spoilers and leaks to a minimum, but that's become more difficult thanks to how much interest their movies generate.
Over the last few years though, the people most responsible for spoiling what comes next in the MCU have been the actors who appear in the films, most notably Tom Holland and Mark Ruffalo. Both of them have built up reputations of not being able to keep Marvel's secrets, but Holland is the one who normally is crowned the king of leaks. This reputation has worn on Holland a bit though, and he's now saying that Ruffalo is responsible for bigger and more frequent spoilers than he is.
Holland recently held a panel at the FanX convention in Salt Lake City and Ammaross Danan (via Comic Book) shared the former MCU star's comments. This wasn't an unprompted statement by Holland though, as one fan asked him during the Q&A whether he or Ruffalo was the bigger spoiler. Holland said with a smile, "I haven’t spoiled anything," and then elaborated after some pushback to that statement by the audience.
I’ve spoiled a few things, but Mark Ruffalo said that everybody dies at the end of Infinity War. But the thing is, no one took him seriously. Like if I had said that, everyone would be like, ‘yeah, it probably happens, yeah.’ I mean, Mark live-streamed the first 20 minutes of Thor [Ragnarok] by accident. I didn’t do that, so I have to say Mark is.
Holland may not have as clean of a spoiler slate as he leads on, but he's absolutely correct on the magnitude of what Ruffalo has leaked. It wasn't until after Avengers: Infinity War came out that the interview of Ruffalo spoiling the film's ending months ahead of time resurfaced. Holland is right too. No one believed Ruffalo at the time, despite Don Cheadle's genuine shock at what he just said. But, Ruffalo's most well-known spoiler is easily live-streaming the beginning of Thor: Ragnarok.
The good news for Holland though is that he'll no longer have to worry about keeping secrets for the MCU. As of right now, Marvel Studios and Sony have stopped working together on the Spider-Man franchise. This fallout will see Holland's Spider-Man leave the MCU behind and eventually join Tom Hardy's Venom in Sony's Universe of Marvel Characters. So, unless the two studios come back together at some point, Holland's days of spoiling the MCU are over. This will mean that Marvel can no longer creatively use him to promote their movies - like "leaking" posters or titles - and leaves Ruffalo as the unquestioned spoiler king of the MCU moving forward.