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Sophia Bush Splits With One Tree Hill Costar Austin Nichols

USMagazine, Wednesday, February 15, 2012, 3:40pm (PST)

One Tree Hill is nearing its long-awaited series finale -- and not a moment too soon for CW star Sophia Bush, 29.

The actress has split with her on-and-off beau of six years, Austin Nichols, 31 -- the third guy she's dated from the just-wrapped TV hit -- a source tells the new issue of Us Weekly (on stands Friday).

PHOTOS: Ugly celebrity breakups

Bush broke it off with Nichols (who plays her husband) "because she didn't think he was the one," explains a source. "She's moving on."

PHOTOS: Stars who wed too young

The actress was wed to Chad Michael Murray in 2005 and dated James Lafferty in 2009. The final episode of One Tree Hill airs April 4 on The CW.

Tell Us: Are you surprised Sophia Bush and Austin Nicols are over?

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