Reeser's character Taylor Townsend first appeared during the show's third season, and joined the cast as a regular as of the fourth season. Her quirky character reinvigorated the show, and she quickly became a fan favorite. After The O.C. concluded, she joined The CW pilot The World According to Barnes's cast as "[the lead character]'s down-to-earth girlfriend, a paralegal and the daughter of an FBI agent."

In addition to The O.C., Reeser appeared in recurring roles on the WB's Maybe It's Me, ABC's Complete Savages, Grounded for Life, My Life DisOriented, FX Network's It's Always Sunny in Philadelphia, and is a spokesperson for Clean & Clear. She has also appeared in a number of other television programs, as well as the films The Girl Next Door and the small-town indie "Our Very Own". Maxim ranked Reeser as the 57th most beautiful woman in the world in 2006. She also appeared on the cover of the December 2006 issue of Stuff magazine (U.S. version)

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