This will mark Fey's fourth time hosting "Saturday Night Live" since leaving the series in 2006. The "30 Rock" alum first hosted back in 2008, and then again in 2010 and 2011. Arcade Fire will serve as musical guest that night for the third time. Their upcoming album is due out on Oct. 29.
Fresh off her much-talked-about VMA performance, Miley Cyrus will be both host and musical guest the following week on Oct. 5. She previously hosted the sketch comedy series in 2011. Cyrus' newest album, "Bangerz" will be released Oct. 8, featuring double-platinum lead single, "We Can't Stop" as well as her brand new single "Wrecking Ball."
Bruce Willis will host "SNL" for the first time since 1989 on Oct. 12 with musical guest Katy Perry, who last appeared on the show as host in 2011.
"Saturday Night Live" has reportedly added five new cast members for this season following the departures of Fred Armisen, Jason Sudeikis and Bill Hader. Seth Meyers is also leaving the show in the fall to host "Late Night."
"SNL" returns for Season 39 on Sept. 28 on NBC.
View slideshow: Meet the new "SNL" cast members and writers