Julia Stiles: 'Heartless' Opening Night Party!

Julia Stiles strikes a pose at the Heartless opening night party held at the Pershing Square Signature Center on Monday (August 27) in New York City.

The 31-year-old actress was joined by Martha Stewart, cast members Julianne Nicholson, Gary Cole, Betty Gilpin, and their writer Sam Shepard and director Daniel Aukin.

PHOTOS: Check out the latest pics of Julia Stiles

The Off Broadway play has been extended to play through September 30!

10+ pictures inside of Julia Stiles and others at the Heartless Opening Night Party…