Mila plays the main character in the franchise, a mom of two named Amy Mitchell.
Justin Hartley hit the carpet with his new wife actress Chrishell Stause, who he married on Saturday night.
Later that year in October they welcomed daughter Wyatt.
Mila and Ashton got married in July the following year.
She finished off her glamorous ensemble with smokey eye makeup, pink lipstick and rosy blush on her cheek bones.
A Bad Moms Christmas, which is set to be released on November 1, is a sequel to the hit 2016 sequel, Bad Moms.
But Ashton Kutcher, 39, and Mila Kunis, 34, made their red carpet debut on Sunday night at the Breakthrough Prize Awards at the NASA Ames Research Center in Mountain View, California.
The last time the duo walked the carpet together was in 2000 during their time on sitcom That '70s Show.Dax, 42, donned a Christmas sweater with grey jeans and Converse sneakers.Kristen and Dax shared a steamy kiss during the premiere.First time for everything: Ashton Kutcher, 39, and Mila Kunis , 34, made their red carpet debut on Sunday night at the Breakthrough Prize Awards at the NASA Ames Research Center in Mountain View, California And if one considers they finally kindled a romance back in 2012, after meeting each other in 1998, it took them only five years as an official couple to make their red carpet debut.Their hit show ran for eight years, spanning from 1998 to 2006. The two were seen picking up coffee and later buying sunflowers ... Friends don't let friends rock red socks with shorts ...