The 'Office' star knew the 'Mad Men' actor as a teenager.
Kemper and Zach Cherry spoke to ET about co-hosting the baking competition, which sees Americans entering the iconic tent.
ET takes you behind the scenes of a new, must-see holiday film.
From the halls of Dunder Mifflin Paper Company to... ? See where you favorite stars from the long-running NBC comedy series are now.
The actress apologized for participating in an 'unquestionably racist, sexist, and elitist' debutante ball.
'Ignorance is not an excuse.'
The actress drew headlines this week after her past participation in a pageant over 20 years ago resurfaced.
Ellie Kemper, Jane Krakowski and Carol Kane also gush about working with the 'Harry Potter' star in the interactive Netflix movie.
The original star of the celebrated sitcom stopped by to guest star in the live special.
The actress revealed that she had given birth a month ago.
NBC's hit series returned on Tuesday and ET broke down all the episode's biggest moments.
'America's Got Talent' season 14 continues to deliver excitement, entertainment and so much emotion! 'AGT' airs Tuesdays on NBC.
The actress awarded the hardworking performers with the ultimate honor during Tuesday's third night of Judge Cuts.
ET is breaking down the best celebrity graduation speeches of the year.
