sophia austin lexus green 'One Tree Hill' stars Sophia Bush and Austin Nichols split“One Tree Hill” stars Sophia Bush and Austin Nichols have called it quits after six years together.

US Weekly reports that Bush, 29, was the dumper, breaking off the relationship with Nichols, 31. The pair play a married couple on the CW show, which airs its final episode on April 4.

“She didn’t think he was the one,” says the magazine’s source. “She’s moving on.”  

Bush posted this telling tweet Wednesday, referring to Katy Perry’s breakup song “Part of Me”: “New anthem. Hell yes @katyperry. Here’s to personal growth. Courage. And having the balls to live your best life. The right decision is often the hardest, but the most profoundly important. #GetItGirl.”

Bush was briefly married to her former “OTH” co-star Chad Michael Murray and dated James Lafferty. Time to move to another hill.

Posted by:Jennifer Harper