It's time for the 2015 SAG Awards, and the stars are rockin' red carpet.



Tonight, in the heart of awards season, the 21st Annual Screen Actors Guild Awards is broadcasting live from Los Angeles at 8 p.m. ET / 5 p.m. PT on TBS and TNT, with red carpet arrivals starting two hours earlier.



This year's nominees include veteran actress Patricia Arquette of "Boyhood," whose earlier awards season wins make her the frontrunner for Best Supporting Actress. Meanwhile, Alejandro González Iñárritu's ambitious "Birdman" has racked up four nominations -- the most by any film -- including a Best Actor nod for Michael Keaton. In TV, ABC's "Modern Family" leads the way with four nominations, with yet another nod for Best Ensemble Cast in a Comedy Series.



Before the winners are announced, check out the red carpet photos of your favorite stars. From Benedict Cumberbatch and Jennifer Aniston, to the always chic Julia Louis-Dreyfus.