Kieran Culkin Interrupts Jon Hamm's 'Saturday Night Live' Monologue, Jokes About What's In His Gray Sweatpants - Watch Now!

Jon Hamm kicked off his episode of Saturday Night Live with his monologue on Saturday (April 12) in NYC.

The 54-year-old actor returned for his fourth time as host of the sketch series, and after talking about his many cameos over the years, Kieran Culkin stepped in for his own cameo!

“I know a cameo may seem inconsequential, but it really is an important part of the show. Like when a sketch needs that something special to take it from a medium sketch, to a marginally medium sketch...