Yesterday I was fortunate enough to sit down for a quick chat with the infinitely talented Neil Patrick Harris on the set of Columbia Pictures The Smurfs, where he was forthcoming with plenty of juicy details about his upcoming projects and career.

The most interesting – and definitive – piece of information that he gave me was that he will, in fact, re-team with Kal Penn and John Cho for A Very Harold and Kumar Christmas, which is currently filming in Michigan. Even though he was mowed down by Beverly D’Angelo’s madame in the 2008 sequel Harold and Kumar Escape From Guantanamo Bay, NPH will make a glorious, unexplained return to the series.

Additionally, he talked briefly about the success of his Joss Whedon collaboration – the internet sensation Dr. Horrible’s Sing-A-Long Blog – and said that he’d love to go for round two with Whedon, Nathan Fillion and crew. Unfortunately, he couldn’t talk more about the status of a follow-up as all of the players are busy with work (Whedon is now directing The Avengers, while Fillion has a hit TV show in Castle).

Speaking of Whedon/Harris collaborations, the pair worked on an acclaimed episode of Glee, which Harris described as a truly amazing experience. When asked about whether or not he’d return to the hit FOX series, he said that he’d love to, but “the networks like to keep their actors…on their network”, (referring to his long-standing contract with CBS for How I Met Your Mother) and verified that he doesn’t think that he’d have the time or authority to work on another episode. Sad, but honest…

So, just to recap: NPH will grace the screen in the third Harold and Kumar flick, he’d love to sequelize Dr. Horrible, but doesn’t think that anyone has the time to get it made and he will not likely return to FOX’s Glee. You heard it first, here on Hollywood.com