After Stephen Colbert and Burnett talked a little about the latter's adoration for Jimmy Stewart, Kevin Spacey, whose idol is Burnett, came out doing his Stewart impression. In classic Stewart-style, Spacey then read a poem made specifically for Burnett. Fair warning: You might want to break out the tissues for this one.
"The Late Show with Stephen Colbert" airs weeknights at 11:35 p.m. ET on CBS.
Also on HuffPost:
For a constant stream of entertainment news and discussion, follow HuffPost Entertainment on Viber.