The pair, who are expecting their third child together, are planning to rekindle their romance, reported the New York Post.
A source close to the pair said, "They're a couple again. They're moving back in with each other."
It was previously claimed that the couple, who have sons Noah and Bodhi together, are considering calling off their divorce.
The 29-year-old actress tied the knot with Green, 42, in Hawaii in 2010. She filed for divorce from the actor last August, citing irreconcilable differences.