The Spanish actress, 37 and the Thor actor, 30, were last seen attending the 2014 Golden Globes awards ceremony over the weekend, making it Elsa's first high-profile appearance since she announced her pregnancy.
Dressed in an elegant floor-length black Paule Ka gown, Elsa looked the picture of happiness with Chris on her arm. The couple beamed at the cameras, with Chris photographed tenderly touching Elsa's baby bump.
Elsa, who is in her third trimester, is expected to give birth in spring. The twins will join toddler India Rose, who will turn two shortly after the twins arrive.