The actresses' participation in the event was announced this week by the guild.
The prize presentation honoring the best in film and television in 2010 will be simulcast on TNT and TBS Jan. 30.
Dawson announced the nominations for this year's SAG Awards along with Angie Harmon, who is also set to be a presenter when the winners are announced.
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NBC reportedly holds celebs hostage to Jimmy Fallon's show