John Stamos; actor Tituss Burgess. Also: Lukas Graham perform.
Susan Sarandon; actor Josh Hopkins; actor Matt Walsh. Also: Catfish and the Bottlemen perform.
Allison Janney; Bradley Whitford. Also: Bibi Bourelly performs.
Actor Sebastian Stan; actor Zach Woods. Also: Travis Scott.
The British actor and comedian steps into late night, taking the reins from previous host Craig Ferguson.
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