Another one bites the dust!

Rachel Bilson and longtime partner Hayden Christensen have split after almost ten years together, Us Weekly reports.

"She’s full-time back in L.A. He’s in Toronto. They’ve been on the outs for a couple of months," a source dished to the mag. "They are completely, officially done," the source added.

The pair began dating after meeting on the set of their 2008 film Jumper and got engaged the following December. They called off their engagement in 2010, but then reconciled and welcomed daughter Briar Rose in 2014.

The couple were notoriously private, but the Hart of Dixie did open up about how she was in a relationship during a Cosmo interview in 2013.

"I'm a really good girlfriend — I always put all that first in my life. I'm definitely the person who would make him his favorite dinner to come home to. I love to cook, so we make dinner at home a lot and watch movies," she boasted.

Can anyone go the distance in Hollywood?!