Shailene Woodley, we hardly knew ye. At least not in "The O.C."

Woodley, see, had the distinction of playing Kaitlin Cooper a handful of times in the first season of the FOX soap. Marissa's (Mischa Barton) younger sister was then whisked off to boarding school, and we haven't seen her since.

That's about to change, though, and with the character's return, Kaitlin will be played by a different actress. Willa Holland ("The Comeback") will play New Kaitlin in a multi-episode arc starting early next year.

Boarding school has apparently hardened Kaitlin, who's now 14 and is turning into a miniature version of her mom, Julie (Melinda Clarke). FOX says she will "wreak havoc, turn heads and introduce a darker, edgier element to the sun-drenched O.C."

"Willa is a real presence and a wonderful actress," 'O.C.' creator Josh Schwartz says. "She can be sweet as a little girl, but also dangerous and much more self-possessed than her age would suggest. She seems like Mischa Barton's little sister and looks it, too."

The 14-year-old Holland, stepdaughter of director Brian De Palma, has also appeared in a couple of independent films and worked as a model. She also guest-starred in the pilot for FOX's "The Inside."

Old Kaitlin, meanwhile, is doing just fine. In addition to her time on "The O.C.," Woodley, also 14, has made several appearances on NBC's "Crossing Jordan" and stars in The WB's movie "Felicity: An American Girl Adventure" later this month.