ET has the details... Katie Holmes, Josh Brolin and a host of other big names have been added as presenters at this Sunday's 15th Annual Screen Actors Guild Awards®. Best Actor nominees Brolin, Amy Adams, Viola Davis, James Franco, Taraji P. Henson, Emile Hirsch, Frank Langella, Dev Patel, Freida Pinto and Michael Sheen will introduce their nominated cast film clips. Holmes, Emily Blunt, Claire Danes, Ralph Fiennes, Kristin Scott Thomas and Marisa Tomei will present Actor® statuettes. Plus, 'The Wrestler''s Evan Rachel Wood will introduce a filmed salute to performances that were "Trailblazers" either in their casting or subject matter. Celeb presenters already announced for the show include Amy Poehler, Taye Diggs, Susan Sarandon, Christina Applegate, Angela Bassett, Jon Hamm, John Krasinski, Eric McCormack and Kyra Sedgwick. The SAG Awards are often a litmus test for the Academy Awards, which are set to air February 22. Get all your Oscar coverage on MSN.