Mischa Barton just phoned into "On Air with Ryan Seacrest" and called her recent DUI a major disappointment -- and something she never intends to do again. Duh!
Barton was busted in December on suspicion of DUI, possession of marijuana and a controlled substance and driving without a valid license.
Mischa: I'm 100% Responsible for DUI
1/10/2008 1:12 PM PST BY TMZ STAFF
Get TMZ Breaking News alerts to your inbox