VIDEO: John Mulaney Discusses the Sondheim-Themed Episode of DOCUMENTARY NOW!

On last night's episode of "Late Night with Seth Meyers," John MULANEY stops by to talk about the Stephen Sondheim-themed episode of Documentary Now!, his lifelong love of musicals, and why he wasn't allowed to perform in his high school's theater productions.

Watch the interview below!

IFC's DOCUMENTARY NOW! will parody D.A. Pennebaker's classic making-of Company documentary, in an episode called "Original Cast Album: Co-Op."

The episode will tell the story of the recording of a cast album for the fictional musical Co-Op. Taran Killam, John MULANEY and James Urbaniak play producers overseeing the recording for the cast album. Alex Brightman, Richard Kind, Paula Pell and Renee Elise Goldsberry play the stars of Co-Op.

The episode will honor Pennebaker's 1970 documentary Original Cast Album: Company, which showcased the efforts of an exhausted orchestra and exhausting performers to get an album recorded during a marathon session. Elaine Stritch's monumentally dramatic attempts to finish and perfect her performance of "The Ladies Who Lunch" was the highlight of the film.

Documentary Now! was co-created by Fred Armisen, Bill Hader, Seth Meyers and Rhys Thomas and is executive produced by Lorne Michaels. DOCUMENTARY NOW! returns to IFC on Wednesday, February 20 at 10PM with the first of seven all-new episodes.

Photo Credit: Lloyd Bishop/NBC