The 42-year-old Boardwalk Empire star was joined by her co-star Kelly Macdonald for a few pictures as they walked down the red carpet together.
Also at the event was the ladies’ other co-star, Vincent Piazza.
Make sure to tune in for the 2015 SAG Awards, airing TONIGHT at 8/7c on TNT and TBS!
FYI: Gretchen is wearing a Dennis Basso gown, Christian Louboutin shoes, and Solange Azagury-Partridge earrings and ring. Vincent is wearing a Ted Baker tux.