Keira Knightley Is Wearing Erdem at the 2015 SAG Awards

Keira Knightley - P 2015

Keira Knightley - P 2015

'The Imitation Game' star rocked a deep purple tiered frock and glittering ear cuff.

Mom-to-be Keira Knightley stepped out in a lacy purple number by Erdem on the SAG Awards red carpet

PHOTOS See The Complete SAG Awards Red Carpet, Here

Knightley, who's nominated for best supporting actress for her role alongside Benedict Cumberbatch in The Imitation Game, paired her look with a dark, smoky eye and a studded crystal ear cuff. 

See THR's Complete SAG Awards Coverage, Here