1 of 7
Fred Armisen as Regine (October 6, 2012)
Broecker: He's playing the exotic girlfriend who's really not so exotic. He's wearing Louise Brooks hair, and sort of hipster glasses. He is wearing a nice ladies' undergarment to give him lots of shape and structure. And also, the first time we did it in rehearsal, we found out that he was going to spread his legs a lot. So it was a little bit of a scramble to go, ''Oh, we need to cover that so that the audience doesn't get scared by what's underneath there.'' The fun is that [the costume] helps Fred do that character. He puts it on, and the costume and actor are sort of married together. And that makes it funny.
2 of 7
Justin Timberlake as Caligula (March 9, 2013)
Justian: It became one of his favorite costumes — I think the breastplate really sold it to him. It's fun when we get to flex that theatrical muscle and create a whole different world. We had a custom-made horse head created [for Taran Killam]. I think he was cast because we were relying on his body as part of the costume. It's really subtle and not really noticeable for the audience, but there were different costumes for whatever socioeconomic role [the actors] were playing within the sketch. More just for our sake than even in the audience — but if they pick up on it, that's even better.
3 of 7
Justin Timberlake as Veganville Mascot (March 9, 2013)
Justian: We have somebody we work with [for Timberlake's mascot costumes], a craftsperson named Bob Flanagan, who helps us create all those costumes. Between the writer Paula Pell, Steve Higgins — one of our producers — and Justin, it's a collaborative effort. The costume has to be built in a way that Justin can bob up and down and use his arms, but it still has to restrict him enough that it becomes a funny bit.
Entertainment Weekly: Are all the mascot costumes hanging together in a closet somewhere?
Broecker: Unfortunately, we can't have them out because we don't have enough space. So they're actually in the archival box. We're hoping that they're all next to each other and having a lovely conversation.
4 of 7
Martin Short as Royal Family Doctor (December 15, 2012)
Broecker: He looked sort of like a crazy Gene Wilder, with that gap tooth. You're taking the British thing and heightening just enough, and then the actor goes, ''Okay, I'm going to take this even further.'' The performer's going to add the thing; we're giving the icing on the cake, and he's giving us the cherry.
5 of 7
Taran Killam, Bruno Mars, Bill Hader, and Tom Hanks as the Merryville Brothers (October 20, 2012)
Justian: I like the original version of [the Merryville Brothers' costumes], where it's all pinks and yellows. It's just adorable. But with Bruno Mars, we did the Halloween version. It was fun to do a recurring sketch and twist it to the appropriate season, with orange and black plaids. And Bruno was totally into doing it.
6 of 7
Bruno Mars as Sad Mouse (October 20, 2012)
Broecker: I love that sketch. I like anything where there's a little bit of sadness. Walking through Times Square at a certain time of night, there's just a feeling of, ''Oh my god, what is that person's life like?'' There's so much abuse that those people have to handle.
Justian: We do a read-through on Wednesday, and then we're scrambling to do pre-tapes as early as Thursday night. So we just started calling around, seeing if we could rent a mouse costume from anybody. We found it and brought it down with a little bit of distressing, stuff that we could wash out.
Entertainment Weekly: Did you have a say in finding the costume that the mouse fell in love with?
Broecker: There does sometimes reach a point where you go, ''Well, it can be a carrot, or it can be a dog, but it can't be an octopus.''
Justian: I think we negotiated on that one, didn't we? I kind of remember there being an alligator as an option. I know that there were a lot of cats in the mix. A plethora of cats, actually.
Broecker: And we couldn't have a cat and a mouse, because then it becomes Tom and Jerry.
7 of 7
Taran Killam, Aidy Bryant, and Zach Galifianakis as 'Game of Game of Thrones' contestants (May 4, 2013)
Broecker: The Game of Thrones sketch was fun, the nerds.
Justian: Depending on how they shoot the sketches, sometimes you don't see the whole costume on air. Those sci-fi nerds that they were playing had on so many other elements that were never shown because they were behind the podium.
Entertainment Weekly: Do you ever half-design costumes, because you know the whole thing won't be visible?
Justian: Oh, sure. You know what we call Weekend Update? ''You never really want to see what's behind the desk.''
More from EW
Ring in 2017 With These TV Countdown Parties
Baddest TV Villains of 2016