The couple, who met on the set of 2006 movie Jumper, became engaged in December (08) and speculation is rife over when they will tie the knot.
Bilson sparked reports she had already exchanged vows with Christensen after she was spotted at a New York City fashion event sporting two gold bands around her engagement ring.
But a rep for Bilson insists the couple is still waiting to walk down the aisle, telling celebrity blogger Just Jared, “They were not married over the weekend. As you know she is known for her fashion forward style. She decided to accessorise the ultimate accessory.”