She may star in Bad Moms, but by all accounts Mila Kunis is anything but.And the actress looked every inch the glowing mother-to-be as she walked the red carpet on Tuesday night, where she cuddled up to her co-star Kristen Bell.

Showing off her growing bump in a black velvet dress, the 32-year-old smiled happily as she joined her co-stars at the film's premiere in Los Angeles.

Mila's pretty black dress featured a purple and red sash around the chest and waist, while a pair of pale pink stilettos completed the look.

Mila - who is expecting her second child with husband Ashton Kutcher and raises daughter Wyatt with him - was joined by her husband, who walked the red carpet separately. 

Mila took some time off after having her daughter before returning to work on Bad Moms, in which she stars with Kristen Bell, Kathryn Hahn and Christina Applegate.

And she's thankful she had such a good experience on the set of the film as it taught her that it is important for her to feel 'fulfilled in order to be the best parent she can.

She told Extra recently: 'I took a minute off from acting after I had Wyatt, and it was kind of serendipitous that this movie came about.

Acting is like 17 hours days, it's not a nine-to-five. Having the script and having the amazing group of women that I worked with, besides my husband who is super supportive,

Joining Mila at Tuesday's premiere were a whole host of her co-stars, including Kristen Bell and Kathryn Hahn.