Viewers are curious to know why Marissa Cooper, portrayed by Mischa Barton, left the Fox drama series, The O.C. Introduced in Season 1, Marissa was a key character who was rebellious, risk-taking, and wealthy. She was emotionally distant from her mother but was close to her father. Her tumultuous romantic storyline with Ryan Atwood (Ben McKenzie) was a popular discussion among fans.…
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