Kunis and Kutcher hitched?

Ashton Kutcher has set the Internet abuzz with rumours that he has secretly married fiancée Mila Kunis.

The former That ‘70s Show co-stars became engaged in February last year after starting dating in April 2012. Mila gave birth to the couple’s daughter Wyatt Isabelle Kutcher on September 30 and now it seems the pair could have taken the next step in completing their family unit.

“Happy New Year love the Kutchers” read a photograph posted by the 36-year-old actor on his Facebook page on Thursday. The words were written in the sand on a beach with a heart drawn next to them. The post led to immediate speculation that couple had tied the knot in private over the festive period.

Reps for both stars are yet to comment on the reports but as they are notoriously private, the world could be waiting a long time for a confirmation.

However if they have headed down the aisle, it would be a major U-turn for the Ted actress, who previously admitted to having little interest in marriage.

“I never wanted to get married. From the age of 12, I prepared my parents for no marriage," she told W magazine. "Then things changed - I found the love of my life. Now my theory on weddings is: don't invite anyone. Do it privately and secretly. My parents are OK with that. They're just excited that I said yes."

While the 31-year-old previously dated Home Alone actor Macaulay Culkin, this would be her first union. It would be second time lucky for Ashton, who was previously married to Ghost actress Demi Moore until they separated in 2011 after six years as man and wife. Their divorce was finalised in December 2013.