February 03, 2015 09:30 AM

Mila Kunis‘s first red carpet as a mom was out of this world.

Only four months after welcoming daughter Wyatt Isabelle, the Jupiter Ascending star showed up for the Los Angeles premiere of her new sci-fi film — and it was a totally wow-worthy appearance.

Kunis, 31, showed off her best assets in a black bustier Dolce & Gabbana frock, complete with a full-skirt, paired with lacy Christian Louboutin stilettos and a jeweled necklace. She wore her long dark locks in loose curls and finished off her look with a nude lip.

But motherhood has taught Kunis that there’s much more to life than the glitz and glamour of Hollywood.

“Not to say that this is meaningless,” she told PEOPLE on the red carpet. “But, truly, how little this matters and how much I’d rather be home right now.”

Gregg DeGuire/WireImage

The new mama first showed off her svelte body after baby during a December appearance on the Late Late Show, where she shared her secret to getting back in shape. “Breastfeeding is a great workout,” she said.

But despite stepping back from the spotlight, Kunis has been plenty busy with her now 4-month-old baby girl. With Ashton Kutcher at work during the day, the actress has been caring for the couple’s first child without a nanny.

“We want to be the people that know what to do when the baby’s crying to make the baby not cry anymore,” Kutcher told Ellen DeGeneres of their decision to hold off on hired help.

“We want to know, like, when she makes a little face or something, we want to be emotionally in touch with her. And I think the only way to do that is by being the one who’s there.”

– Anya Leon with reporting by Reagan Alexander

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