Emma Stone stepped out in LA last night for the premiere of her new movie Gangster Squad, where she stars alongside Ryan Gosling for the second time. For the night, she went monochromatic in red, choosing a strapless crimson dress and clutch by Christian Louboutin. This outfit was all about the accessories - or should we say accessory. Her statement-making Lanvin necklace finished off her premiere look perfectly. Watch on to hear Emma talk about the 1940s fashion she wore in the film! On Allison McNamara: BCBGeneration dress. Hair and makeup by Kasia Bohos.