Crews, Gurira, Mann and Slater will be announcing the nominees in all 25 Golden Globe categories which spans film and television.
The Hollywood Foreign Press Association -- which organizes the Golden Globes -- also teased that a major announcement concerning the ceremony will be made at the press conference.
The Golden Globes are set to be aired live on Jan. 6 at 8 p.m. ET on NBC.
The network announced in September that the Golden Globes will remain on NBC for the next eight years.