Mila Kunis has officially crossed over into MILF territory, welcoming a baby girl with fiancé Ashton Kutcher. And we're here to spill her biggest beauty secret — aside from her jaw-dropping looks — it's one product in particular that's the key to stealing her hotness. Mila is rarely spotted without charcoal eyeliner. While black might look a little severe, this softer hue gives Mila a come-hither, slept-in beauty look that's undeniably alluring. Plus, it makes her amazing eyes stand out even more. Try this trick, and emulate more of Mila's best beauty looks when you scroll down.