Lindsay Lohan is perhaps the most famous child-to-adult actor there is. We all know her work and we probably all have a favorite Lindsay Lohan film. Ours are The Parent Trap and Mean Girls! In fact, The Parent Trap was probably her first real big break (she had appeared in other things, but this was when she really started to get noticed).
Anyone with an internet connection will be able to tell you that Lohan has had her problems with substance abuse. She definitely went of the rails for a while and was often photographed partying late at night. Her main problem was alcohol abuse, but she also dabbled in other party drugs. After several stints in rehab, she seems to be back to her old self again, but she hasn't done anything major since starring alongside Jane Fonda and Felicity Huffman in the film Georgia Rule in 2007.