Here's Why 'Avengers: Age Of Ultron' Will Make You Ship Hulk And Black Widow

Scarlett Johansson and Mark Ruffalo weigh in on their Marvel movie romance.

With Reporting by Josh Horowitz

Nothing can get between the Science Bros, but that doesn't mean there isn't room in Tony Stark and Bruce Banner's hearts for others.

In "Avengers: Age of Ultron," at least Bruce's other passions will come into focus when it's revealed that he has a thing for a fellow teammate: Black Widow. Without getting into too much detail, the Hulk's alter-ego and former Soviet spy Natasha Romanoff have come a long way from their horrifying Helicarrier encounter in the first "Avengers" movie. Is love actually possible for these two? It's not as strange a pairing as you might think, according to Scarlett Johansson.

"I will say that these characters come from having a lot of trauma in their past. They've experienced a lot of loss and destruction, that they've very much been a part of," she told MTV's Josh Horowitz about Bruce and Natasha coming together. "For Banner, it's been a totally out-of-body experience. For Natasha, she hasn't made a lot of active choices to participate in these horrendous things she's been a part of. She feels very disconnected from that part of herself."

"They're coming together as two people who are reluctant superheroes and are seeing similar things in each other," she continued. "They're tethered to this greater cause that's greater than any kind of potential love. It makes everything very complicated for them."

And what about Bruce and Tony's bromance? Does that complicate any potential romance between Bruce and Natasha? Not at all, according to Mark Ruffalo; the old saying of "three's a crowd" no longer applies, at least not where Earth's mightiest Science Bros are concerned.

"The kids are all doing it these days," he laughed. "No judgments."