Credit: Jason Merritt/Getty Images For Montblanc Photo: Sophia Bush and Austin Nichols in Santa Monica on June 18, 2011

The third time just wasn’t the charm for Sophia Bush.

According to Us Weekly, the One Tree Hill star, 29, has split with her on-again, off-again co-star boyfriend Austin Nichols, 31. The two have dated periodically over the past six years, but Sophia apparently “didn't think he was the one,” explains a source.

Austin, who plays her on-screen hubby, wasn’t Sophia’s first One Tree Hill co-star love. The actress was married to Chad Michael Murray for a brief five months in 2005, and she dated James Lafferty in 2009.

After nine seasons on the air, One Tree Hill is ending its long run on April 4. Now that filming has wrapped, Sophia will have to find a new pool of co-stars to romance!

Source: Us Weekly

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