Shauna Robertson, Edward Norton's fiancee, is to give birth to their first child, a source close to the Hollywood actor told UsMagazine.com.
Whether the pair expect a son or daughter was not reported.
Norton, 43, is known for his movies "Moonrise Kingdom," "The Incredible Hulk," "American History X" and "Primal Fear."
Robertson is a Canadian film producer.
The couple got engaged in 2011 after six years of dating, UsMagazine.com said.