"Nothing happened while we were filming," he tells GQ magazine in its June issue, confirming his relationship with Shame actress Nicole Beharie, 27. "We started talking more on the promotion thing. So, yeah, it just sort of unfolded like that."
The two first garnered buzz after they were photographed in New York City.
"I'm seeing Nicole, we're trying to see each other as often as possible," Fassbender, 35, who was linked to Zoë Kravitz last summer, says of their relationship. "That's kind of difficult when she lives [in New York] and I live in England."
Mario Testino / GQ