January 28, 2016 09:15 AM

Talk about retro glam!

Anne Hathaway showed off her growing baby bump in a very 1960s-inspired look at the L.A. Art Show and Los Angeles Fine Art Show’s 2016 Opening Night premiere party at the Los Angeles Convention Center on Wednesday.

The Intern actress wore a mod minidress that was covered in black-and-white circles with high-heeled black sandals. Hathaway, 33, was glowing in subtle eye makeup and a bold berry lip.

Michael Tran/FilmMagic

At the event, which was hosted by Hathaway and her husband Adam Shulman and benefitted St. Jude Children’s Research Hospital, the mom-to-be spoke to PEOPLE about the importance of the child-centered cause.

“The first time I went to St. Jude Children’s was 12 years ago,” she said. “It was a place that I had heard about but after I saw it firsthand, I knew that my life had changed and that I would do anything to help those kids and their families, and I would do anything to support this cause.”

She added, “I truly think that St. Jude represents the best of us and deserves our full support always.”

In November, sources confirmed Hathaway and Shulman were expecting their first child, with the actress later showing off her bare baby belly at the beach.

And since the big reveal, Hathaway has shown no signs of slowing down.

“She seems to have a lot of energy,” a source recently told PEOPLE. “She was always very active and likes to be out and about. Nothing seems to have changed after she got pregnant.”

All that’s changed, the source says, is that “she looks even happier than before.”

— Andrea Park

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