Everett Collection
Sandra Gonzalez
October 26, 2012 AT 09:25 PM EDT

That sound you hear is my inner nerd crying out in glee.

EW has confirmed news —  first posted on HIMYM’s Twitter account — that Seth Green, who played Alyson Hannigan’s on-screen romance Oz on Buffy the Vampire Slayer, will guest in an upcoming episode.

Green will play Daryl LaCoutre, a man who considered Marshall (Jason Segel) and Lily (Hannigan) among his best friends in college. The problem? They barely remember him! That makes things interesting when they cross paths with him 12 years after they last saw him and find that he’s still living in their college town and, according to casting scoop, is “creepily obsessed with having them in his life.”

The news comes just weeks before another highly anticipated guest star, Joe Manganiello, is set to begin his two-episode arc on Nov. 12. Just yesterday, EW had the first look at his appearance, which you can see here.

Green’s episode is tentatively scheduled to air Dec. 10, but until then, let’s just stare at the photo above.


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