03/18/2010 05:12 am ET Updated May 25, 2011

Levi Johnston Demands NBC Retract "Tonight Show" Skit Mocking Fake Tweets

Levi Johnston's supposed Twitter account has received much attention — most recently on the "Tonight Show," where William Shatner performed a dramatic reading of @LeviJohnston05's tweets. However, Johnston's lawyer says it's not him tweeting, and now he's demanding a retraction from NBC.

TMZ reports that Rex Butler, Johnston's attorney, is demanding a retraction given Conan O'Brien's quote introducing the Tweets, when he said, "All real ... we did not make these up."

Butler told TMZ that he is "in the process of dealing with Twitter first. I think they have an obligation once something like this happens to make some kind of corrective measure."

Watch Shatner's dramatic reading here.