Watts doesn’t believe that a piece of paper would make her relationship with Schreiber any stronger.
The happy parents of two boys, who have been together since 2005, were at the centre of engagement rumours last March, when the actress turned 40 and was wearing a new diamond ring.
"Liev gave me this beautiful ring. We’re very much together. We just don’t have that certificate and that’s okay with both of us," the beautiful blonde told OK! magazine.
Watts doesn’t entirely count out the possibility of getting married one day, but says that it would have to be spontaneous.