The 59-year-old actress opened up about her marriage with the That 70s Show star in her autobiography released in 2019.

Despite their rocky past, there seems to be no bad blood between the exes, or between Demi and the actor’s wife Mila – who are starring in a new commercial together.

ETOnline shared an exclusive sneak peak of the unlikely collaborators’ AT&T fiber commercial where the two made a rare appearance on screen together.

Mila, 38, and Demi both play themselves in the funny ad as they attend their high school reunion.

Ahead of the announcement of the winner of the “Most Admired Alum” award, both girls believed they snagged the victory as they made their way up on stage.

The two acted shocked when they spotted each other attempting to claim their prize with Mila asking Demi: “What are you doing here,” in which Demi responded with a shrug of her shoulders.

However, both were surprised when a fellow alumnus won the award instead, leaving them dumbfounded as they awkwardly shared the stage.

As they looked out into audience, Demi commented to Mila: “I had no idea we went to the same high school,” leading Mila to reply: “We have a lot in common.”

Turns out, the ad was loosely based on the actresses real-lives as they both went to the same high school, Fairfax High School in Los Angeles.

In fact, it was Mila’s idea to involve Demi in the skit while she was brainstorming ideas for the commercial.

She told ET: “It was during my first collaboration meeting with AT&T that we discovered Demi was also a Fairfax High alum.”

“I thought it would bring humor and laughs to what was already a great ad. I reached out to her and was so delighted she jumped on board. Now we’re just working on becoming gigillionaires,” she added.

Demi reciprocated the feelings telling the publication: “Who knew being a Fairfax alum would have brought this unexpected opportunity, to come together with Mila in such a fun and playful way? AT&T has brought new depths to the importance of meaningful connection. Gigillionaires!”

ALLEGED INFIDELITY

The team up was a surprise to fans with the pair’s shared relationship history.

Demi was married to Ashton from 2005-2013, beginning their romance when the she was 41 and the Two and A Half Men actor was just 25.

Demi talked about their open relationship in her 2019 autobiography, Inside Out, where she revealed she had agreed to having a threesome, but added: “It was a mistake.”

Demi, who shares three daughters with Die Hard actor Bruce Willis, then blamed the openness in their marriage for his alleged infidelity.

She said: “Because we’d brought in a third party into our relationship, Ashton said, that blurred the lines and, to some extent, justified what’s he’s done.”

Ashton, who married Black Swan actress Mila Kunis in 2015, responded by tweeting: “I was about to push the button on a really snarky tweet. Then I saw my son, daughter, and wife and I deleted it.”

He also tweeted fans his phone number, implying Demi was lying by telling them to reach out to him for the “truth.”