23 Famous People You May Have Forgotten Were On "The O.C."

    The O.C. was like the stepping stone to so many other, (not as good) teen soap operas.

    1. Chris Pratt as Summer's hippie friend at Brown:

    2. Paul Wesely as Donnie

    3. Paris Hilton as a random club girl named Kate:

    4. Colin Hanks as Grady Bridges:

    5. Amber Heard as this salesgirl:

    6. Morena Baccarin as Maya Griffin:

    7. Emmanuelle Chriqui as Jodie

    8. Jeffrey Dean Morgan as this prison guy:

    9. Jamie King as this spring break girl:

    10. Shailene Woodley as Marissa's little sister

    11. Jackson Rathbone as Kaitlin's college ex-boyfriend:

    12. Ashley Benson as an enemy of Kaitlin's:

    13. Janel Parrish as this teen:

    14. Lucy Hale as Hadley, a friend of Kaitlin's:

    15. Chris Carmack as Luke:

    16. Nikki Reed as Sadie:

    17. Logan Marshall Green as Trey:

    18. Steve-O as a Marine:

    19. Chris Brown as a band geek named Will:

    20. Cam Gigandet as Volchok:

    21. Olivia Wilde as Marissa's girlfriend:

    22. AnnaLynne McCord as this girl who just wants to get high:

    23. And Max Greenfield as young Sandy Cohen: