Former "That '70s Show" stars Mila Kunis and Ashton Kutcher reportedly have welcomed their first child together.

TMZ.com said the couple, who have dated since mid-2012, had a baby girl Tuesday night at Cedars-Sinai Hospital in Los Angeles.

They arrived by themselves without entourage or family around 6 a.m. that day, the site said. Kunis, 31, was photographed in late February wearing a large and conspicuous diamond ring, leading to speculation that she and "Two and a Half Men" star Kutcher, 36, had become engaged.

Neither has publicly confirmed an engagement.