10 celebrities who aged very rapidly (With Pictures)

4. Mischa Barton (2006 vs. 2012)

Mischa Barton is best known as the statuesque Marissa Cooper from the 00s teen soap, The O.C.Despite being only 29, the actress looks much older than her years. The cause, as usual, is substance abuse. In 2009, Barton was held under psychiatric evaluation against her will, the same steps that were taken after Britney Spears’ meltdown. Apparently, she had been spiraling for two years, coincidentally or not the years that followed the end of the show that made her famous. Now, Mischa Barton is back on the fringes of fame, popping up in entertainment media now and again. But abuse and rehabilitation took its toll, bruising Barton’s good looks indelibly.