Lee Kirk, Jenna Fischer's real-life husband, directed one episode of The Office (S9,E14: Vandalism). In it, Jim is depicted as a slob and a non-ideal roommate.

[u/drguillen13]

[u/ITrCool]

Didn’t Lee Kirk also appear as a cameo in the birth episodes when they had their first kid? I think he was the “lactation consultant”, IIRC.