It has been revealed that Mila Kunis' first kiss was with her "That 70s Show" co-star and former Calvin Klein model, Ashton Kutcher.

The kiss came all the way back in 1998 when Kunis was just 14 years old. That would have made Kutcher 20 years old at the time - a large age gap considering Kunis' young age.  What was more nerve racking for Kunis was that the kiss was to carried out in front of a camera crew and broadcast on one of the most popular sit coms on television.

People Magazine has discovered the fact after researching into a 2001 interview where Kunis spoke about the kiss and how nervous she was.

"I was like, 'Oh, he's so cute, it's the Calvin Klein model!'" Kunis told the magazine in 2001. "Then I was like, 'I have to kiss him?' I was so nervous and uncomfortable. I had the biggest crush on him."

However, she found a way to calm herself down and feel more confident about the upcoming kiss.

"I totally perfumed myself," she said. "And I was like, 'Hey, I feel better about myself.'"

People also spoke to Kutcher about what Kunis had said, and how it was her first kiss. "I'm the first guy she kissed? Oh my god, I had no idea! I'm so glad I didn't know that or it would've been too much pressure... I was so nervous," Kutcher said.

"She acted so cool. She seemed as if she'd done it a thousand times. I was the one with the butterflies in my stomach. I mean, here's this little girl and I have to kiss her. It was nerve-racking," he added.

Explaining how Kutcher had been his usual self; making those around him laugh, Kunis said of the kissing scene, "Ashton was so nice. He just made jokes and gave me funny little compliments. He made me laugh."

Now more than a decade later the two have been spending more and more time together after they both split from long-term relationships. Kutcher's divorce from actress Demi Moore was announced at the end of last year, and Kunis recently split from long-term boyfriend, actor McCaulay Culkin. Speculation continues to swirl about whether the two have now become an item, although as yet they have denied being anything other than friends.