LOS ANGELES (KABC) -- "Avengers: Age of Ultron" exploded onto the big screen Thursday night and debuted as the biggest Marvel movie opening ever.
It's overnight box office numbers are upwards of $27 million, which puts it on track to earn more than $230 million over the weekend.
In this sequel, we see things on screen we've never seen before. But the stunning visual effects were not added until much later in the movie-making process. That meant the film's actors needed to rely heavily on one thing: their imaginations.
When asked if there was ever a time the actors had no idea what a scene would look like, co-stars Chris Hemsworth and Chris Evans both said it happened every time.
"Is there ever a time you do know what it's gonna look like?" said Evans, who plays Captain America. "You're always kind of blind. You've got to tap into the part of your childhood where you're like 'I'm playing pretend,' it's like you're in your backyard as a kid running around with a sheet around your neck, just trying to make believe and you're pretending to be a superhero. You're punching nothing and you're talking to tennis balls. You kind of put a lot of trust in the people who know what they're doing."
And topping that "trust" list is director Joss Whedon, who said he had plenty of "green screen" confidence in his stars.
"All these people are well versed enough in it that it doesn't throw them," Whedon said. "Occasionally you'll be like 'look this way. Why? We don't know yet. We just wanna have it. Thanks.'"
Robert Downey Jr., who plays Iron Man, said that faith and trust extends beyond the green screen experience.
"It's also the scene work, too," said Downey. "It's like, 'does this feel like it's gonna fit in to the larger thing?' It's almost you take more faith with the non-green screen stuff because the green screen stuff you know there's going to be bells and whistles in back of you. But when it's just a scene with Bruce Banner and Tony it's like 'do they care anymore?' So I think it comes down to Mark (Ruffalo) and I, or whoever it is in the scenes, and everybody this time around really, just still investing it with a sense of themselves and a sense of enjoyment and purpose."
"Avengers: Age of Ultron" is rated PG-13 and is now in theaters.