Mila Kunis and Ashton Kutcher go way back. The two started off as costars on That ‘70s Show and now the two are set to be husband and wife!

“Ashton and Mila have talked about getting married for quite a while,” a business source close to Kutcher told PEOPLE in December. Adds another Kutcher pal: “They’re incredibly happy together.”

The actress stepped out on Thursday with a diamond sparkler on her ring finer! Good pick Ashton. 

Check out the ring here