Joining the Puerto Rican movie star will be Angie Harmon and JoBeth Williams.
Jeff Margolis, SAG's executive producer, announced the presenters in a statement Monday night.
The SAG Awards nominations in five film and eight television categories will be revealed at the Pacific Design Center in West Hollywood.
Dawson is currently starring opposite Denzel Washington in the action thriller "Unstoppable."
The awards ceremony will be simulcast live coast-to-coast on TNT and TBS on Jan. 30 2011 at 8 p.m. EST from the Shrine Auditorium in Los Angeles.