New parents Ashton Kutcher and Mila Kunis have sparked rumours they have married in secret after Mila was spotted wearing a a plain band alongside her diamond engagement ring.

The couple were at the Staples Center in LA this week to see the Los Angeles Lakers versus Oklahoma City Thunder, leaving two-month-old daughter Wyatt at home. Putting on a display for the famous 'Kiss Cam' and chatting to fans, the new apparently platinum addition to Mila's ring finger was hard to miss.

The duo, who appeared to spend much of the basketball match more interested in each other than the game, got engaged earlier this year.

Mila, 31, has previously said she hadn't wanted to marry until she met "the love of my life" in Ashton, but would prefer a low-key wedding. The new mum, who was wearing a 'W' pendant at the game, said in July: "I never wanted to get married. From the age of 12, I prepared my parents for no marriage.

"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 okay with that. They're just excited that I said yes."

She added: "We all get movie star crushes. I'm marrying mine."

Did Ashton Kutcher and Mila Kunis get married in secret?