Earlier this year, IGN was able to visit the set of Avengers: Age of Ultron in London with a small group of journalists. We'll have plenty more on all of the things we saw and discovered during our journey in the weeks and months to come.

For now, we're able to share our conversations with Tony Stark himself, Robert Downey Jr., and his buddy and parter in crime-fighting, Bruce Banner (Mark Ruffalo).

They're really just teasing things in these interviews, but if you'd rather go into the film completely blank...You are warned, we do discuss it...

Take a look at our interview with Ruffalo below for more on his possible romance with Black Widow, how he and Stark work together to create powerful forces, his antagonistic relationship with Scarlet Witch, and what he learned from Andy Serkis.

Are Hulk and Widow Forming a Special Bond?:

Mark Ruffalo: [Looking around nervously] Uhhh, we don’t have a relation---What kind of relationship? [Laughs}

What's the Balance Between Banner and The Hulk?:

“ There is a confrontation brewing between the Hulk consciousness and the Banner consciousness.

[Looks to Disney representative] Did you tell them that? Okay, I’ll play. I’ll play along. Yeah, yeah. There’s a really important relationship between…[Laughs] I was just happy that I was in the movie at all! And any scenes that I got to be with her were...a big bonus.

Ruffalo: There's more of him.

Banner and Hulk kind of have come to a detente. [Laughs] We left the last time with this idea that I’m always angry and therefore I have some control over it. But with anger, when you think you have control over it, you absolutely don’t. And so there’s still a wrangling going on. There is a confrontation brewing between the Hulk consciousness and the Banner consciousness that I think we’re starting to head into right now.Yeah, I think he’s trying to become more a part of a group. I don’t think he’s ever felt like part of a family or part of something. He’s always sort of been this outside person or on the run -- trying to shun humanity. [Laughs] But now I feel like he has the idea that maybe he is part of something and he’s trying to really be a part of something. And he feels more comfortable with the fantasy that he could actually be a part of something. But I still think it’s a struggle for him and I don't think he ever fully has it under control. But I think in this version he’s sort of as close to having a normal life as he possibly could. Which might include…some romance. But, you know is that ever possible for Banner is really the question.

Banner + Stark = Ultron:

“ In this version he’s sort of as close to having a normal life as he possibly could.

Ruffalo: Basically, Tony took the orphan Banner into the fold. I was just made aware of where my apartment was in the Stark Complex...the Stark Tower.

And so, you know, I think they’re working together. I have a Lab and Banner’s working on a lot of stuff. And Tony’s working on his own stuff and they complement each other. And so you could tell that when we get into this film that they’ve been working together.

And they’ve gotten even more of a short hand together. So that's been built out quite a lot and it’s fun. It’s cool.

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Ruffalo: Oh, you mean like 'Hey, let’s see if we can do this?' It’s a little bit like Cool Hand Luke that way.

Will We Get to Know Hulk Better?:

“ I think you wanna' be ambiguous enough not to cover too much ground so that you have somewhere to go if they ever do wanna' do a stand alone.

You know, it's 'You think you could beat me, and then I’ll beat the crap out of you, and then I beat the crap out of him.' [Laughs] It’s kinda’ like that, but not totally like that. It has a surprise. A little twist to it as well.

Ruffalo: Well I think the mythology of Banner is just kind of known because of the other movies. You know we’re sort of building off of them, but it’s similar. He’s on the run. He doesn’t want to turn into the Hulk.

All people want him to do is to turn into the Hulk. And so, you know I think that it’s not as uphill a battle as introducing a completely new character. And the nature of these movies is that

there’s 8 of us and it’s 10 minutes of screen time for each of us...and then if we include the bad guys. So it’s hard to do a lot of character development in it.

How Scarlet Witch Gets Inside Their Minds:

But I think this movie goes even more into that than the last one for everybody. And so you're sort of playing catch up, but also I think you want to be ambiguous enough not to cover too much ground so that you have somewhere to go if they ever do want to do a stand alone. Another stand alone.

“ It’s like Sid and Nancy. She’s the Nancy. We're all the Sid.

Ultron and The Vision, Hulk's 'Baby':

That’s a bad trip.She’s able to bring out the worst in us. And there are people in our lives who can do that. And somehow when you're an actor you tend to gravitate towards those people. She’s like...It’s like Sid and Nancy. She’s the Nancy. We're all the Sid. She’s everyone’s Nancy. [Laughs]I love the new kids on the block. I love Scarlet Witch and Quicksilver. They’re really cool. The characters.

“ He’s like a specimen when he walks out in that thing. He’s like the perfect man. He’s The Vision.

Q : What's your relationship like with The Vision?

The vision is the Vision! He is so dope. Ohhh, he’s my baby! He’s pretty incredible. And the idea of him and where he comes from! It's just...he’s very independent. He is a really great character. Yeah, people are gonna' love The Vision. And Ultron’s amazing. He’s amazing. It’s really good.We have a lot of scenes together. I've done a lot as a group. I have a couple of one-on-one things with him, but I love him. He’s great. And he’s gonna' be...It’s like King Lear. It’s great.

Ruffalo: All I know is I’m happy that I walk in and I leave the trailer and I can go back an hour later and Paul Bettany’s still in make-up. [Laughs] That makes me feel good.

Sorry Paul. But you should see him. And he’s like a specimen when he walks out in that thing. He’s like the perfect man. He’s The Vision.Continue on for what Ruffalo learned from Andy Serkis, plus Stark's crazy house party...