Pregnant Natalie Portman Shows Off Baby Bump in Fitted Dress at Washington, D.C. Premiere of Jackie

She’s glamming it up — for two!

Natalie Portman glowed at the Washington, D.C., premiere of her film Jackie, showing off her major baby bump in a tight-fitting gray dress.

The 35-year-old actress, who portrays former First Lady Jackie Kennedy in the film, attended the premiere at the Newseum and a related panel discussion, looking flawlessly comfortable in a dark gray, fitted knee-length dress.

Portman is expecting her second child with her husband, French choreographer Benjamin Millepied. They already have one son together, 5½-year-old Aleph.

Want all the latest pregnancy and birth announcements, plus celebrity mom blogs? Click here to get those and more in the PEOPLE Babies newsletter.

The Oscar winner stopped by The Tonight Show to visit Jimmy Fallon while promoting her new film on Tuesday, and explained that she’s not as pregnant as she looks.

“I’m a small person in general,” she said. “You show a lot faster and a lot more when you’re small.”

She added, “Everyone thinks I’m about to pop and about to give birth at any minute and I have months to go.”

Watch The Tonight Show Starring Jimmy Fallon on Yahoo View, available now on iOS and Android.

RELATED VIDEO: Natalie Portman Shows off Her Belly Bump at N.Y.C. Screening of Jackie

The actress has been both confident and fashion-forward on red carpets, displaying her growing baby bump at the Gotham Awards in New York City on Tuesday night.

Portman first revealed to Matt Lauer on Tuesday’s Today that she was due in the spring, and told Fallon that a store clerk had recently congratulated her on the impending due date.

“I went to this store the other day to buy water and the guy at the checkout counter was like, ‘Almost, huh?’ ” she said. “And I was like, ‘No, not even close.’ “