The "That '70s Show" co-stars who found love offscreen are now engaged.

Mila Kunis and Ashton Kutcher started dating about two years ago, and now, the "Black Swan" actress is wearing an engagement ring, according to E! News.

Kunis was spotted shopping on Thursday with a ring on her finger, and a source told E! that the two absolutely intend to tie the knot.

The two have a very long history together.

When Kunis was a teenager and co-starring with Kutcher, he was her first kiss.

In a 2001 interview with People, she said, "I was like, 'Oh, he's so cute, it's the Calvin Klein model! Then I was like, 'I have to kiss him?' I was so nervous and uncomfortable. I had the biggest crush on him."

Kutcher found out in 2001 that she had never kissed anyone before him.

"I'm the first guy she kissed? Oh my god, I had no idea!" he said. "I'm so glad I didn't know that or it would've been too much pressure."

When the two started dating, they were secretive about the relationship. Kunis even shot down rumors, claiming they were ridiculous. Kutcher had split up with Demi Moore for about seven months when he started dating Kunis.

A close friend of the couple told OK! Magazine that the two can't wait to start a family.

"They want babies, so they see no reason to wait," the source said. "They kind of got engaged casually before his divorce was finalized. It just happened. They were going to make it official after the divorce went through - though they don't really see the need to issue a press statement about it."