Zac Posen, Betsey Johnson
Courtesy of Zac Posen/Twitter; Betsey Johnson/Twitter

New York Fashion Week hasn’t even begun—it officially starts tomorrow night!—but that hasn’t stopped designers from tweeting their excitement! The #NYFW TwitPics are coming in fast, with behind-the-scenes looks at everyone’s work, from Zac Posen and Betsey Johnson, to Joseph Altuzarra and more—click through the gallery to see them all!

Cameron Diaz’s InStyle Couture Assignment
Couture Week Cheat Sheets
• Chanel at Couture Fashion Week