20 celebrities who appeared on 'The O.C.' before they were famous

Basically ALL of the 'Pretty Little Liars' cast.

Back in the day, landing a small role (yep, even as an extra) on The O.C. was basically #goals for any up-and-coming actor.

10 years after the show's final episode, we take a look at all the huge stars who once had itty bitty roles (we've got Starlords, pretty little liars, Salvatores brothers, etc.)

Check out all the celebs who starred on The O.C.