Olivia Wilde showed her growing baby bump in a tight dress at the Her premiere in L.A. on Dec. 12 Credit: Frazer Harrison/Getty Images

Olivia Wilde had a very long, very eventful day on Thursday, Dec. 12. After waking up at 3:30 in the morning to announce the 2014 Golden Globe nominations, the pregnant Drinking Buddies actress hit up the premiere of the movie Her at the Directors Guild in West Hollywood, where she proudly showed off her growing baby bump in a form-fitting dress. Click here for more pics of the star.

The 29-year-old star -- who, until last night, had kept her bump mostly under wraps -- rocked a bright blue, body-conscious David Koma design with crystal embellishments around the neck and waist, just above her noticeably rounder belly. She accessorized the frock with Jimmy Choo shoes and Jacob & Co. earrings.

"Such a sweet, great night, celebrating the premiere of Her with Joaquin, Amy, and Spike," the first-time mom-to-be tweeted after the event, alongside a photo of herself with Joaquin Phoenix, Amy Adams, and Spike Jonze.

Earlier in the day, Wilde, Aziz Ansari, and Rashida Jones revealed that Her had been nominated for three Golden Globe Awards. (Written and directed by Jonze, the film scored nods for both Best Picture and Best Screenplay, as well as an acting nomination for Phoenix.)

"Verrrrry proud of the teams from Rush and Her," Wilde tweeted of the accolades. "Congrats on the GG noms. Well deserved. High fives to everyone else too!"

As previously reported, Wilde and fiance Jason Sudeikis are expecting their first child together next year. They confirmed the news in October.