Emma Stone and Jane Curtin are late additions to the line-up of performers who'll celebrate Bill Murray when he receives a top prize for humour.
The actresses will help honour Murray on Sunday night as he is given the Mark Twain Prize for American Humour during a ceremony in Washington.
Jane performed alongside Murray on Saturday Night Live, while Emma co-starred with him in the little-seen movie Aloha.
Also new to the line-up are musician Rhiannon Giddens and Ivan Reitman, who directed Ghostbusters.
Bill's Ghostbusters co-star Dan Aykroyd has dropped out of the event because he is due to perform elsewhere.
Previously announced performers include David Letterman, Sigourney Weaver and Aziz Ansari.