Baby to Make Three for Ashton Kutcher and Mila Kunis

This is a year of big announcements for Ashton Kutcher and Mila Kunis.

On the heels of their engagement news, the couple, who met while starring on "That '70s Show," is expecting their first child together, sources confirm to Yahoo.

E! was first to report the baby news with an eyewitness telling the site that the "Ted" actress was seen at a prenatal yoga class in Hollywood. According to People magazine, the "Two and a Half Men" star and his love are "both very, very happy," but it's "still early." And, no, they aren't having twins — though, yes, Ashton is a twin himself. Officially, reps for both stars are not commenting on the couple's happy news.

On Saturday, Kutcher and Kunis cozied up during a lunch date at Sweet Butter Kitchen in Sherman Oaks. She was wearing her giant sparkler and an oversized black and white sweater, a baggy look that's been making numerous appearances lately… and now we know why.

That evening, they brought their love fest to a Clippers game — and ended up on the Kiss Cam. While Barry White's "Can't Get Enough of Your Love" played, Kunis seemed embarrassed by the thought of PDA, but Kutcher turned around his baseball cap and they shared a sweet smooch. She then cutely hid her face.

[Related: Famous Faces on the Kiss Cam]

The pair's relationship spans back to 1998 when they played loved up teens Jackie and Kelso on Fox's "That's '70s Show." When she was 15 and he was 20, they locked lips on the show for the first time. It was her first kiss ever.

They started dating in real-life in 2012 after he ended his marriage to Demi Moore. Since his divorce was finalized — in November — the low-key couple has become slightly more open about their romance. In February, she told Cosmopolitan magazine about a special date night tradition they have during which they dress similarly in jeans and white T-shirts.

[Related: Ashton Can't Help But Show His Love for Mila]

Last month, Kunis was announced as a spokesperson for Jim Beam bourbon, appearing in three ad spots for the brand. This is a project she may have to hit the brakes on now that she's expecting, not unlike Jessica Simpson pausing her Weight Watchers deal when she discovered she was expecting her second child in 2012.

What should the future Mr. and Mrs. Ashton Kutcher name their future offspring? Share your suggestions in the comments below. And not "Kelso" or "Jackie," OK?