Ashton Kutcher and Mila Kunis are engaged

Jackie and Kelso are getting married -- or, at least, their real-life counterparts are.

Ashton Kutcher and Mila Kunis are engaged, it was revealed Thursday.

Multiple media outlets reported the news after Kunis, 30, was photographed wearing a diamond ring on left hand while out shopping earlier that day.

"They're incredibly happy together," a Kutcher pal told People.

She and Kutcher, 36, both co-starred on the hit TV series "That '70s Show." He now stars on CBS' "Two and a Half Men," while her recent acting credits include "Ted," "Oz the Great and Powerful" and the upcoming "Jupiter Ascending."

Rumors the two were a couple first surfaced in April 2012. This will be the first marriage for Kunis (who previously dated Macauley Culkin) and second for Kutcher. He split from actress Demi Moore in the fall of 2011 and their divorce was finalized last year.

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