Johansson's pregnancy news comes six months after her rep confirmed to Us back in September that she was engaged to French journalist Dauriac. The couple first went public with their romance in November 2012.
During a Jan. 15 appearance on Good Morning America, Johansson said their wedding was "far off." "I'm not doing any wedding planning," she said at the time.
The Don Jon actress, who was once married to Ryan Reynolds, revealed in the October 2013 issue of Esquire that Dauriac helped make her a less jealous person. "I didn't think I was a jealous person until I started dating my current, my one-and-only," she shared. "I think maybe in the past I didn't have the same kind of investment. Not that I liked my partner less, I just wasn't capable of it or caring that much."
E! News was first to report on Johansson's pregnancy.