It's hard to believe that One Tree Hill premiered over 13 years ago! While most of the cast rose to fame after the series' successful debut, many of the actors had been in other projects and walked the red carpet years prior.
MUST SEE: The 'One Tree Hill' Reunion Pics Will Give You ALL the Feels
Click through the gallery to see the cast of the show on their very first red carpet vs. now.
2001 vs. 2016