The 9 Best Dressed Stars at the 2015 SAG Awards

When it comes to the red carpet, here are the 2015 SAG Awards' big winners!

The Cake star's plunging neckline on her vintage John Galliano gown ensured that all eyes were on her.

Only Lupita Nyong'o could pull off this show-stopping striped Elie Saab dress, which looked even more perfect with her braided updo.

Matthew McConaughey's better half was a knockout in this deep purple velvet Donna Karan gown that perfectly hugged her curves.

The Still Alice star's sparkly custom deep green Givenchy dress was absolutely stunning paired with her milky skin tone and signature red hair.

The fearless sheer Dior creation was effortlessly sexy -- despite accidentally taking down Naomi Watts on-stage during the Birdman cast's acceptance speech for Best Acting Ensemble! 

The Theory of Everything star channeled Audrey Hepburn in this pretty pink off-the-shoulder Balenciaga dress.

The Big Bang Theory actress showed off her fit physique in a slinky, bright red Romona Keveza dress.

Maternity dressing done right! The Imitation Game actress looked adorable in a purple peplum Erdem dress.

The Orange Is the New Black star not only took home the award for Outstanding Performance by a Female Actor in a Comedy Series, but she looked spectacular while doing so in this bright yellow Angel Sanchez dress.