While we don't know how she fares against the hooded killer in Sorority Row, Rumer Willis triumphed in a lace Stella McCartney jacket at last night's Hollywood debut of the slasher.
Willis has been making top fashion marks for the whole of Row promotion, in girly getups from the likes of Zac Posen. She's developing her personal style and depending on box office numbers next weekend, her own stab at movie stardom.
Until then, mom Demi showed out to support Rumer in a standard LBD with ruffles and rose detail down the front.
Other women in black: Audrina Patridge in a textured mini with a sweetheart neckline and adorable bow-shaped clutch, Jamie Chung in a tattered shift and newcomer Briana Evigan in a sat dress with a soupy train.