Conan O'Brien Gets the Big O

6/2/2009 9:15 AM PDT BY TMZ STAFF
Conan O'Brien finally started his "Tonight Show" run last night -- and we're guessing Will Ferrell's interview had to be cut a bit short, because the standing ovation Conan received when he first walked out lasted

Conan O'Brien: Click to watch
That being said, dude did a great job.