Adam talks to guest host Kathryn Hahn about being surprised by Mark Hamill on our show years ago and she surprises him with Chewbacca, and she talks about filming 'Step Brothers' together, not really singing during the car scene in the movie, their kids watching it for the first time, having to be super secretive about 'Severance,' and he brings exclusive spoiler photos from season two. Watch 'Jimmy Kimmel Live!' WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.