Alex Kelly (The O.C.)

Alex Kelly is a fictional character on the FOX television series The O.C., portrayed by Olivia Wilde. She is bisexual, dating both Seth Cohen and Marissa Cooper in the second season of the series.

Characterization and background
Creator Josh Schwartz described Alex as "the bad girl who runs the Bait Shop, which is the new club the kids are going to be hanging out at where all these bands will be performing at. She's our 'Nat' (Beverly Hills 90210), if you will."