Rose Byrne: amfAR Gala with David Lauren!

Rose Byrne attends the amfAR New York Gala to kick off Fall 2011 Fashion Week at Cipriani Wall Street on Wednesday (February 9) in New York.

The 31-year-old Damages actress was joined by David Lauren, whose father Ralph Lauren designed her dress!

FYI: David is engaged to George W. Bush‘s niece Lauren Bush.

“We gave her a sexy new color and cut reminiscent of actress Jane Birkin,” says celeb hairstylist Harry Josh. “It’s a 60′s throwback haircut with equal parts mysterious, French, and bold.”

The trailer for Rose‘s next film X-Men: First Class will be debuting tomorrow on Facebook!