New York Fashion Week is here, meaning nights of raucous (very chic) parties for designers and celebrities. Behold the best party photos from the week so far, featuring Vera Wang, Calvin Klein, and many well-dressed stars. Kylie and Kendall Jenner chilled with A$AP Rocky and Kanye to debut their clothing line Kendall + Kylie, while Ben Stiller, Penélope Cruz, and Owen Wilson made a fierce catwalk appearance at the world premiere of Zoolander 2. Heidi Klum wore a sparkling sheer cape at the amfAR gala, while Ciara performed at the Keds Centennial. Click ahead to see Anna Wintour, Karlie Kloss, Liv Tyler, and more.