hmm i think most would be Nathan, Brooke & Peyton.

nathan brooke lucas haley and peyton

Nathan's changed the most. brooke's matured alittle. but her actions and words in season 4 (using lucas to get to peyton; desecrating the death of Peyton's mother) show that she still has a LOOOONG way to go. all of the characters have matured steadily, but nathan's growth and maturity stood out the most.

definitly nathan.he was such a bad boy but he changed in to a man n a loving husband during the last two years.never thought i'd see nathan change this much when i saw the pilot..

Nathan & Brooke

nathan has changed the most but he didnt change for Brooke.brooke changed for herself so thats why i chose her

Haley!

Season 1- She was practcally a saint. In season 2 they got married in high school and she kissed Chris behind her husbands back. She left him for music (not saying that is right or wrong) and in season 3 she came back to try again with him and make things right. In season 4 she got pregnant with Jamie while still in high school. In season 5 became a teacher and threatened the students she will fail them if they leave and told lucas that he couldn't marry lindsay (GO HALES) and hired an insane nanny! In season 6 so far she got attacked by her crazy nanny and put her and her sons life in danger un-intentionally.

well all those things are true but as a person haley though different isnt nearly as different as nathan or brooke

So Nathan,he's changed so much!!

I would say nathan then Brooke