Angelina Jolie Talks about their twins

Angelina Jolie is one happy mother who is proud of her twin babies, Knox and Vivienne.

Knox and Vivienne are "starting to get very smiley," their proud mom said. "They're at that stagewhere their personality really starts to shine."

As for the rest of the brood, they share a love of their mom's work. "I think it's a great film, and it's brought a lot of joy to children – and to my children, absolutely," Jolie told PEOPLE at the event. "My kids love it. They're very very proud, they've got mom Tigress dolls."

While Jolie – looking slim in a long-sleeved black Ralph Lauren dress and beige pumps with spiked heels – didn't let on whether she'd be attending any of President-elect Barack Obama's inaugural balls in January, she did say she was happy with the election last Tuesday.