Did Woody's casting create any friction on set?

Mullally: Well, I think you know we were just excited they even considered Nick, because he wasn’t a name. You know how the stunt casting they did on that show was outrageous. So for them to even consider him was a big thing. When they cast Woody Harrelson, we were like, ‘Oh, okay.’ ‘Cause you know the network wants famous people.

Speaking of stunt casting, who was your favorite famous co-star to appear on the show, Megan?

Mullally: God, it’s rough. I mean Matt Damon was so funny. John Cleese was my personal favorite because he played my husband for a whole season – and Minnie Driver. We almost had our own like show all living in a house together. And Gene Wilder was just so dear.

Offerman: Alec Baldwin was nuts. I mean…in a good way.

Mullally: He did one of the live episodes, and of course he killed it.

Offerman: Just to be clear, Alec Baldwin’s comedy was nuts. It was crazy how funny he was.

Mullally: We just had so many great people. And all the great pop stars that came on. I had a whole episode with Madonna. She was so professional, very nice and very friendly. She wanted to chat all the time. She was a perfectionist and always wanted to rehearse her scenes a ton.

"Parks and Recreation"
NBC "Parks and Recreation"

It's fascinating to compare a show like “Parks and Recreation” to “Will & Grace,” a show that now seems of a different era. What's it like to look back and see how the sitcom template has evolved?

Offerman: That’s an awfully big thing to wrap your head around and I don’t know that I watch enough TV to answer.

Mullally: Oh, I do.

Offerman: I think the paradigm that Greg Daniels sort of perfected with “The Office” and then on "Parks and Rec" brings the comedy into a much more intimate, realistic setting.

Mullally: More naturalistic.

Offerman: The multi-cam has a hilarious and wonderful presentational feel that in ways can begin to feel canned.

Mullally: Networks really want to try and resurrect the multi-cam because it’s so much easier to shoot. Aren’t the two highest rated half-hour shows both multi-cam? “Big Bang Theory” and “Two and Half Men?" So you know, it’s not without reason. “Modern Family” would probably be third and that’s single cam. I know they want to do that. Maybe audiences are ready to go back to multi-cam, but for me it seems when I watch multi-cam, it feels a little 'time capsule-y.' But I think there’s a way to maybe freshen it up again and make it seem new again. Everything’s cyclical.