Watts and Schreiber met on the set of the 2006 drama The Painted Veil and have been together ever since, reports Couriermail. Despite it being obvious that the star was pregnant, no confirmation was given until her fiance, Liev Schreiber, spoke about it in an interview earlier this month.
"Our first baby came early and I suspect this one will as well. Life gets a lot busier, but it also gets more enjoyable in many aspects," he said.
Naomi has starred in a number of successful films, including the likes of Mulholland Drive and the US remake of Japanese film, The Ring.