The O.C. Flashback Series: Summer Roberts Real High School Yearbook, Sophomore, Junior and Senior Pics

How old was Rachel Bilson when she played Summer Roberts in the O.C.? When it comes to the land of TV, often actors are cast to play characters much younger or older than their real age for some odd reason. It's became very popular for 20+ year old to play teenagers in Hollywood and it must come down to their acting ability and maturity. This was very much the case when it comes to The O.C..With that being said lets reveal Summer Roberts aka Rachel Bilson real high school yearbook photo's as well as how old he was while playing in The O.C..

Above: Rachel Bilson sophomore year yearbook photo's

Above: Rachel Bilson junior year yearbook photo's

Above: Rachel Bilson senior yearbook photo

Rachel Bilson's real birthday August 25th 1981

Real Graduating class of 1999 (Notre Dame High School (Sherman Oaks, CA)  

Harbor School (The O.C. Class of 2006)

The O.C. aired from August 5, 2003, to February 22, 2007

Rachel Bilson was 21 when she started playing Summer Roberts in The O.C. and was 25 by the time the show ended. In the O.C. world that would have made her born in 1988. So that's an 7 year difference from when she actually graduated in real life, now that's Hollywood for ya!

Stay tuned for the rest of the gang!