Summer Roberts is a fictional character from the television series The O.C., which aired from 2003 to 2007. Portrayed by actress Rachel Bilson, Summer is known for her strong personality, intelligence, and distinctive fashion sense. She initially appears as a popular girl at Harbor School and later becomes a central figure in the show's storyline. Throughout the series, Summer develops a romantic relationship with Seth Cohen, another main character. Their relationship evolves from friendship to romance, showcasing themes of love and personal growth. Summer's character is often celebrated for her wit and independence, making her a fan favorite among viewers.