Amy and Louis C.K. ??
She's worked with him in the past (she was in one of his short films) and he has starred on Parks and Recreation. I saw a picture of her son Abel recently. That kid is the SPITTING IMAGE of Louis C.K.. He has RED hair, which neither Amy or Will Arnett have. The kid also has, literally, the same face as Louis C.K.. You be the judge, but I'm thinking they may have had a little affair or something.
http://www.justjared.com/photo-gallery/2637685/amy-poehler-park-archie-abel-21/
This face is such a Louis C.K. face:P
http://www.justjared.com/2012/09/05/amy-poehler-bristol-farms-with-abel-archie/
The kid's adorable, whoever he was fathered by:P.