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 for...ev...er.
That being said, dude did a great job.
Conan O'Brien Gets the Big O
6/2/2009 9:15 AM PDT BY TMZ STAFF
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