We knew they were headed for the altar!

Ashton Kutcher and Mila Kunis secretly got engaged this past summer, In Touch reports.

"It happened over the summer. His whole family had come out to California for Mila's birthday [on Aug. 14], and he did it then," a source dished to the mag.

The couple began dating a little over a year ago, but the Two and Half Men star's divorce from Demi Moore wasn't finalized until this November, so the pair attempted to keep the happy news under wraps.

"They couldn't go public [with the engagement] until his divorce was final. Now nothing should be standing in their way," the source added.

From That 70's Show co-stars to husband and wife!