9/26/2016 4:02 PM PDT BY TMZ STAFF
They released a joint statement saying, “Over the past few months we’ve come to the conclusion that the best way forward for us as a family is to separate as a couple.”
TMZ learned they were on shaky ground as early as January, when they first discussed splitting, and were already living apart.
They say they’ll still be raising their sons — 9-year-old Alexander and 7-year-old Samuel — together during “this new phase” of their relationship.
Liev and Naomi were not married, but had been together since 2005 … shortly before their first film together, “The Painted Veil,” was released.