From left: Natalie Portman (Dress: Dior), Julianne Moore (Dress: GIORGIO ARMANI PRIVE), and Naomi Watts (Dress: Elie Saab) / (C) Getty Images
Julianne Moore (dress: GIORGIO ARMANI PRIVE) / (C) Getty Images
Naomi Watts (dress: Elie Saab) / (C) Getty Images
Natalie Portman and her husband Benjamin Millepied / (C) Getty Images
Sienna Miller (dress: LANVIN) / (C) Getty Images
Doutzen Kroes (dress: Atelier Versace) / (C) Getty Images
Doutzen Kroes (dress: Atelier Versace) / (C) Getty Images