It is a good job Mila Kunis and found Ashton Kutcher.

The 30 year-old actress never wanted or planned to get married, but when her friendship with a co-star transformed into something more...everything changed.

Kunis and Kutcher, who became engaged this past February, are expecting their first child together, and the mother-to-be joyfully opens up about their romance in the August issue of W Magazine.

"My first real kiss ever was with him on the show," she told the mag, referring to when herself and Kutcher starred in the Fox comedy 'That '70s Show' from 1998-2006.

"And when That '70s Show had a prom, my date for the prom turned out to be my fiancé," Kunis continued. "We can honestly say that we went to prom together! I do think that in that episode I went home with someone else. We don't talk about that part."

Kutcher has already been married before (to Demi Moore), but this will be the first time Kunis walks down the aisle.

"I never wanted to get married. From the age of 12, I prepared my parents for no marriage," the 'Friends With Benefits' actress said. "Then things changed-I found the love of my life. Now my theory on weddings is: Don't invite anyone. Do it privately and secretly. My parents are okay with that. They're just excited that I said yes."

"We all get movie star crushes," she added. "I'm marrying mine."

More: Mila Kunis Sends Message To All Future Fathers: Stop Saying "We Are Pregnant"

With the couple's first baby due later this year, Kunis also revealed that she may slow down her acting career to be fully prepared for motherhood.

More: Mila Kunis Speaks Candidly About Pregnancy For First Time To Ellen DeGeneres

"I have never wanted to be the person who only has business on her mind," she explained. "To me, this job has always been a hobby that turned into a great profession, but I don't eat and breathe acting. I'm sure Meryl Streep has a very different point of view. But I'm excited about being a full-time mom."

Ashton Kutcher
Kutcher and Kunis will welcome their first child later this year