Mila Kunis and Ashton Kutcher expecting first baby together

Mila Kunis and Ashton Kutcher are expecting their first child together, E! Online confirmed.

The baby news came after Kunis was spotted attending a prenatal yoga class in Hollywood.

Kutcher and Kunis have been dating for two years and just last month, the "Ted" star was spotted wearing a massive diamond ring while shopping with her mom at the Grove shopping center in Los Angeles.

Kunis shared Kutcher's cozy date night preferences with Cosmopolitan, saying: "We have a thing called white T-shirt night and it's when you wear jeans and a white T-shirt and you go on a date. Nothing fancy, it's just something that you love to do. And whether that's bowling or dinner or going to a cheese shop and have some wine or walking around. I think that's just the best thing to do - and sometimes it's nice to stay at home."

Rumors previously circulated that the couple were expecting twins, but the source told E! they are expecting only one child.

After their engagement was made public, a different source told People how Kutcher asked Kunis' dad for approval first before actually popping the question.

"He talked with Mila's dad around Christmastime," the source said. "He asked for Mark's blessing to marry her. It was important to Ashton to be respectful and traditional. This is the real thing for him and he wants to do it all right."

Kunis and Kutcher have known each other for more than 15 years since they co-starred in "That '70s Show."

The same source shared with People: "They don't want to wait. This relationship started on solid ground and everything is working out. They are in it for the long haul, truly."