We’ll try not to give away spoilers here but Mark Ruffalo kind of does that for us.
A video of an interview with the actor, who plays Bruce Banner/Hulk in five MCU films including Avengers: Infinity War and Thor: Ragnarok, has re-emerged.
The actor appeared on Good Morning America with co-star Don Cheadle at Disney's D23 Expo in July 2017, during which he accidentally revealed the ending. However, he managed to turn it into a joke and no one copped that he’d accidentally let the truth slip.
You can see the mistake about 40 seconds in, and Cheadle’s reaction is genuinely gas:
Uh oh, @DonCheadle, is @MarkRuffalo going to get in trouble with @MarvelStudios now!? #InfinityWar #D23expo pic.twitter.com/WR5C1QCBTb
— Good Morning America (@GMA) July 16, 2017
It wouldn’t be the first time Ruffalo has released one of Marvel’s critically guarded secrets – last year he accidentally live-streamed part of Thor: Ragnarok.