Page Six that they have gone their separate ways.It is claimed that it was Sienna, 38, who broke it off with Lucas, 29, who is the son of art dealer David Zwirner, although no reason was given for the breakup.Back in January, the couple was spotted at the Sundance Film Festival for the premiere of Miller’s film Wander Darkly where it was believed that Sienna was sporting an engagement ring.Although both parties were seen on other occasions wearing their rings, neither she nor Lucas ever confirmed the engagement to the public.It was only in July that Sienna was spotted wearing the ring and the couple had been seen together running errands in the same month.However, sources claimed that the couple had hit a ‘rough patch’ in their relationship.
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