"It is mutual and amicable and they are still friends," a friend of the actors says.
According to the friend, the pair separated several weeks ago. "It was an entirely an end-of-the relationship decision," the friend says. "It had run its course."
Adds a rep for Law: "I can confirm that Jude Law and Sienna Miller are no longer in a relationship."
The actors got engaged in Christmas 2004. But they parted in 2006. They reunited in the fall of 2009 and have been dating ever since.