'The Late Show' is officially coming to an end this month. Here's when you can tune into Colbert's final show on CBS.

Of all the guests that have sat across from Colbert’s various desks over the past 21 years (including both The Late Show and The Colbert Report ), Dawson’s Creek and Fabelmans star Michelle Williams is the Hollywood starlet who turned the normally loquacious wordsmith speechless. He continued:

Stephen Colbert's latest on-air smooches come a day after he shared a kiss with Jimmy Fallon on 'The Late Show'

"She sat down across from me and I went, 'F--k, what is wrong with my head?'" Colbert shared.

NBC will broadcast a “Tonight Show” rerun opposite Stephen Colbert’s final appearance on CBS’ “The Late Show” next week.

The "Late Show" host also name-dropped a few other beautiful guests, including Rachel Weisz and Andrew Garfield.

Stephen Colbert took Jimmy Fallon off guard on Monday night, when the CBS late night host planted a kiss on the NBC late night host. Yes, really. The smooch occurred during a game with fellow Strike Force Five hosts Seth Meyers,

Colbert's final “Late Show” broadcast airs May 21 on CBS.