Business in the front, party in the back!
Rosamund Pike looked gorgeous at the What We Did on Our Holiday premiere on Monday Sept. 22 in London, but the actress was hiding a little secret.
PHOTOS: Rosamund Pike's red carpet style
The Gone Gir l starlet, 35, walked down the red carpet in a stunning black lace dress by Erdem, sporting what seemed to be just an elegantly styled chignon hairstyle.
PHOTOS: Celebrity hair makeovers
Upon further inspection, Pike was actually rocking a newly shaved edgy undercut along her nape.
PHOTOS: Celebrities with bangs and without
The look appears to be an exciting change for the expecting mom, due with her second child in November.
What do you think of Rosamund Pike's new haircut? Tweet using the hashtag #stylebyUs!