Babe alert!

Lizzy Caplan stole the show on the Emmy’s red carpet on Monday night in a fitted Donna Karan Atelier backless dress with a long white train. We can hardly believe that this is the same girl who played Janis Ian in our most favorite movie of all time, “Mean Girls.”

The actress is nominated for Outstanding Actress in a Drama for her work in “Masters of Sex.”

So, do you love her gown as much as we do? Sound off below!

PHOTOS:

See the rest of the Emmys red carpet: