Golden Globe winner Sam Rockwell will make his hosting debut when "Saturday Night Live" returns for the new year. His latest film, the Globe-winning "Three Billboards Outside Ebbing, Missouri," opened Nov. 10 and also stars Globe winner Frances McDormand and Woody Harrelson.
Halsey will join Rockwell, who is also marking her debut as musical guest. Halsey's latest album, "hopeless fountain kingdom," was released in June and peaked at #1 on the U.S. Billboard 200 chart.