E!Online, Us Weekly and People have all reported that Mila is pregnant with the couple’s first child.

The 30-year-old actress was apparently spotted at a pre-natal yoga class in Los Angeles.

The stars or their spokespeople have yet to confirm or deny the claims.

Mila was photographed just last month wearing a massive diamond ring while out shopping, and a source confirmed to E!Online that Kutcher had popped the question to make their romance legitimate.

Ashton and Mila have been friends for many years, having starred alongside each other on That '70s Show, which ran between 1998 and 2006.

Their romance is said to have begun after the breakdown of Ashton's marriage to Demi Moore.