Elisabeth Moss posed for photos on opening night of her Broadway play The Heidi Chronicles at The Music Box Theatre Thursday night in a daring black dress

Elisabeth Moss’s Opening Night Look

Moss’s bold look for The Heidi Chronicles’ opening night featured a halter LBD with a keyhole cutout. The Mad Men actress wore her shoulder-length blond hair in tousled waves and added a splash of color with bright red lipstick – and bright blue high heels.

WATCH: #ElisabethMoss @PinkhamBryce & @realleadelaria cheer @HeidionBroadway on opening nite → https://t.co/KKvUVJgFvq pic.twitter.com/JMNrUb277s

— TheaterMania (@theatermania) March 20, 2015

Prior to the show, Moss posed with her The Heidi Chronicles costars Jason Biggs and Bryce Pinkham.

PIX: @MadMen_AMC stars cheer on #ElisabethMoss @PinkhamBryce @JasonBiggs & @HeidionBroadway → https://t.co/mq2jrKWdKs pic.twitter.com/QK4xya8S6v — TheaterMania (@theatermania) March 20, 2015

In The Heidi Chronicles, a revival of the late Wendy Wasserstein’s Tony and Pulitzer Prize winning 1989 play, Moss plays the titular Heidi Holland. At the start of the play, Heidi is a 1960s high school student, and as she goes on to become a successful art historian, her views on feminism are fleshed out.

‘The Heidi Chronicles’ returns, with Elisabeth Moss. @jessekgreen reviews: https://t.co/a6wzceRjqQ pic.twitter.com/ZQGrBGXVpn

— Vulture (@vulture) March 20, 2015

For opening night, Moss had quite an audience, which included Rose Byrne, Jane Seymour, Susan Sarandon, and Lea DeLaria.

Get The Look For Less: Dress, Sear’s, $32.99. Shoes, Zappos, $49.50.