Breaking News! E! Online is exclusively reporting that Mila Kunis and her fiancé Ashton Kutcher are expecting their first child together! The newly engaged couple began quietly dating in 2012 - after knowing one another for many years. Co-stars on That '70s Show, the pair have been mum about their relationship and made no engagement announcement (we just saw that huge sparkly number on Mila's hand!).

E! reports that Mila was also "recently spotted attending a prenatal yoga class in Hollywood." So exciting! The Kutcher-Kunis baby is the first child for both stars, and bound to be too cute for words. Congratulations to the soon-to-be newlyweds and parents!

We can't wait to see Mila's maternity style, but for now - click through the gallery above to see her best looks!