Celebrity couple Mila Kunis and Ashton Kutcher are reportedly expecting a baby girl.

The 30-year-old 'Black Swan' actress fuelled pregnancy rumours last month when she was spotted attending a prenatal yoga class in LA, reported Us magazine.

Although the daughter-to-be will be the first child for both Kunis and Kutcher, 36, the 'Two and Half Men' star was a stepfather for six years to Rumer, 25, Scout, 22, and Tallulah, 20, who are the children of his ex-wife Demi Moore with Bruce Willis.

The 'That 70s Show' actress had been the subject of pregnancy speculations ever since she got engaged to Kutcher.