Pregnant Mila Kunis concealed her baby bump -- with the help of costar Channing Tatum -- for her first red carpet after her pregnancy reveal on Thursday, March 27 -- see the picture Credit: Scott Kirkland/PictureGroup

Thanks, Tatum! Pregnant Mila Kunis showed off her growing baby bump -- well, sort of -- as she attended the Jupiter Ascending premiere with costar Channing Tatum on Thursday, March 27 -- her first red carpet since her big pregnancy reveal.

The actress, 30, tried her best to conceal her bump as she walked side-by-side with Tatum at Cinemacon in Las Vegas. Kunis glowed in a sleeveless navy knee-length dress for the special night out. She wore minimal makeup and kept her brunette locks down. During their prom-esque photographs, she and Tatum, 33, strategically wrapped their arms around each other for the most part. Click here to see more photos of Tatum and Kunis.

As exclusively reported on March 25, Kunis and fiance Ashton Kutcher, 36, are over the moon about their bundle of joy. "They are happy, healthy and excited to start a family," an insider told Us. Kunis "is all about being a mother."

"There is no rush to get married," the source added of the former That '70s Show costars. "The wedding will be very intimate and private."