WATCH: Mila Kunis Flaunts Svelte Post-Baby Body At The Jupiter Ascending Premiere Four Months After Giving Birth!

Mila Kunis made her first red carpet appearance since welcoming her daughter Wyatt Isabelle with Ashton Kutcher, and she let her trim post-baby body do all the talking!

The new mom stunned on the red carpet of her newest flick, Jupiter Ascending, as she turned heads in a black Dolce & Gabbana strapless dress with a full skirt. She completed the look with Gemfields ruby jewelry by Miiori New York.

The cleavage-baring dress showed off the actress’ teeny waist, as she proved you could look that good only four months after giving birth!

PHOTOS: Mila Kunis' Weight Loss And Post-Baby Body Is Incredible On Jupiter Ascending Red Carpet

The star stopped by The Ellen DeGeneres Show today to chat about her newest addition.

“She's a really good baby," she said of Wyatt. “She was 9.5 pounds when she was born. Because she was so big, she was like a hearty little thing — we skipped the newborn stage. She was a good hearty eater so she slept well. She's 4 months old and wears 6-month clothing. Six to nine. She's a big girl, y'all."

WATCH: Ashton Kutcher Support Mila Kunis On The Jupiter Ascending Red Carpet!

Mila also dished about what a great dad her rumored hubby is! “He is an amazing dad," she said. "I wouldn't have done this by myself. He is 100 percent present. I am breastfeeding so I provide the food for the baby, so his whole thing is changing diapers. He'll never be able to feed her in the early stages — now he can because she's partially bottle-fed — but the second she was born, he changed the first diaper... If he's home, he changes the diaper. He became a master swaddler."