Cameron Diaz: 'What to Expect' NYC Screening!

Cameron Diaz hits the red carpet at the What To Expect When You’re Expecting screening held at the AMC Lincoln Square Theater on Tuesday (May 8) in New York City.

The 39-year-old actress attended the 2012 Met Ball last night at the Metropolitan Museum of Art.

Cameron looked stunning in a Stella McCartney gown with a gold metal clutch. She wore the dress as a part of Colin Firth‘s wife Livia Giuggioli‘s Green Carpet Challenge.

“Yet again the GCC has been given a window on the supply chain and incredible technical processes involved in producing fashion at this level, and Stella McCartney has allowed us to influence this process,” Livia said about the challenge.

FYI: Cameron accessorized with Pomellato‘s tango brown diamond necklace.