Fineman also gets a laughing Keaton to break character during another bit.
The October 19 show will mark Keatons fourth time hosting.
Musical guestEilishreturns as musical guest for her fourth time as well.
Billie Eilish, Michael Keaton and Chloe FinemanNBC/YouTube
The show is dark on Halloween weekend before John Mulany hosts on November 2 with musical guest Chappell Roan.
Saturday Night Liveis produced in association with Broadway Video.
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