Celebrity imposters have been a problem on Twitter, so much so that the company launched its “Verified Accounts” program to add some credibility to those that claim to be well-known public figures.

@OfficialJonah, which billed itself as the official account of Superbad star Jonah Hill, was outed last night by the actor himself on the Late Show With David Letterman. Hill told Letterman that he’s “never been on the website Twitter nor will I ever be on the website Twitter.”

Apparently, the fake even got involved in a Twitter squabble with the real actor and director @Jon_Favreau. Hill shares the story in the video below:

In any event, @OfficialJonah has since acknowledged that his account is a fake, though Twitter is yet to suspend him. At least Hill is laughing about the whole situation; Kanye West was not nearly as amused when he was being impersonated on the microblogging service.

Tags: jonah hill, twitter