Mila Kunis and Ashton Kutcher have been friends forever, and now it looks like they have taken it to the next level.

According to various sources, Kutcher and Kunis got up close and personal with one another at the Los Angeles wrap party for Kutcher's film "Jobs" this weekend, and they didn't seem to care who saw.

On Saturday, they were caught kissing and cuddling in plain sight. Kunis even flashed a grin toward the cameras at one point, according to the New York Daily News. She was sitting on his lap and wrapped her arms around him, stroked his face and played with his hair, according to omg! Yahoo.

The couple, who costarred as on-again-off-again lovers on Fox's hit series "That '70s Show" for eight seasons, have been rumored to be dating since this past spring, but both have declined to talk about their relationship.

The Daily News reported that in April, Kunis, 28, firmly denied she was dating him.

"It's absurd," she told "Extra" sternly when asked if she and Kutcher were more than friends. "A friend is a friend."

In the August issue of Elle, Kunis proclaims that she is "totally single."

"Listen, we hang out. We've known each other for 15 years," she told the magazine. "We have mutual friends. We're comfortable with one another. That's it!"

It doesn't seem that way. She and Kutcher, 34, have been spending a lot of time together this spring. The pair was even photographed taking a ride on Kutcher's motorcycle late last month.

Reports also say that the couple is living together.

According to The Sun, a source said, "They're basically living together. Like any new couple in love, they're pretty much joined at the hip.

"They've been sneaking around for months but there's only so long you can keep it quiet.

"They're staying with each other most nights. Mila's practically moved in to Ashton's Hollywood home."

How does Kutcher's ex-wife, Demi Moore, feel about this? She is devastated.

"Demi is devastated that Ashton has moved on so quickly and is dating Mila," a friend tells RadarOnline.com. "She is beyond heartbroken."

Moore, 49, is especially hurt because she knows that Kutcher's trysts in the past have been with random women, not with someone with whom he has an actual relationship with, according to the Daily News.

"Seeing photos of him kissing another woman is too much for her to handle, it's like having her nose rubbed in it time and time again," the friend told RadarOnline. "She kind of knew it was definitely over between them but I think she was still holding out a little hope for reconciliation - now he's actually dating someone else she knows that's not going to happen."

The ex-couple split last fall after six years of marriage.

"Each time Demi hears about Ashton and Mila it breaks her heart," the source continued. "She really loved him despite the flaws in their marriage and to see him dating someone new, who is so much younger than she is, is like a knife in her heart."