Mila Kunis: "I never wanted to get married"

Pregnant Mila Kunis has opened up about her fiancé Ashton Kutcher in a rare interview, admitting she never thought she'd walk down the aisle before meeting the actor.

RELATED: Ashton and Mila are expecting their first child!

The 30-year-old Black Swan actress spoke to W magazine and revealed how her views on marriage have evolved since dating her fiance - 14 years after meeting on the set of That '70s Show.

Mila Kunis says she changed her mind on marriage when she met 'love of her life', fiancé Ashton Kutcher. Source: Getty Images

She explained: "I never wanted to get married. From the age of 12, I prepared my parents for no marriage."

However, Mila admits her theory changed upon meeting her fiance.

GALLERY: Ashton and Mila's sweetest moments

She revealed: "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."

While Ashton has been married once before to actress Demi Moore, this is Mila's first time down the aisle.

The Ted actress opens up about another 'first' with her future husband.

GALLERY: They dated who?!

She recalled: "My first real kiss ever was with him on the show, and then That 70s Show had a prom, my date for the prom turned out to be my fiance. We can honestly say that we went to prom together."

She reminisces about first meeting Ashton on the show, explaining: "Not only did it introduce me to my fiance, but I'm so grateful that all my mistakes are recorded for posterity. I went through everything embarrassing that a girl can go through in front of my fiance. There's no question that he's seen the worst. I find that comforting."

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