Tarek and Heather El Moussa, Christina Hall evoke Princess Diana: "We are three in this marriage."

Tarek and Heather El Moussa are focusing on building positive relationships within their family despite any negative experiences from the past.

Christina Hall, Tarek's ex-wife, and the real estate experts formed an alliance that not only helped their personal households but also strengthened their friendship, leading to the creation of their new HGTV series, "The Flip Off."

In the Instagram clip, Princess Diana's voice was heard in the background from her 1995 BBC interview where she stated that Camilla Bowles was a "factor" in the breakdown of her marriage to Prince Charles, adding that there were "three of us" in the marriage, making it "a bit crowded."

The caption read, "Three's a crowd, tune in to see the show."

As Hall grappled with the collapse of her third marriage with Joshua Hall, she discovered support from her former spouse, Tarek El Moussa, and Heather.

Since filing for divorce from Joshua in July, Hall has sought support from the couple in unique ways.

The upcoming show will reveal their tumultuous relationship. "This is a competition. We gotta give it our all. Whatever it takes to win, I’ll do it. Halls rule!" Josh told Christina while driving. "You’re supposed to say it with me, or repeat it, or do something that shows you’re on my side."

"Be mindful that you are now a Hall. Avoid getting mixed up in this competition regarding your last name. You come across as impolite."

"Christina responded, "I don't overtalk," to which Josh replied, "Yeah, the s*** you say, and I'm just like, 'I wish you'd shut up already.'""

Josh responded, "My wife is already annoying me," as Christina sighed.

Christina found a friend in Heather during her marriage, and the pair regularly poked fun at each other on social media. When asked about "The Flip Off" again, Christina took a dig at her ex-husband Tarek in the comments.

""If Heather is my partner next time, then Tarek can have Josh," Christina wrote."

Since the former couple announced their divorce over the summer, citing "irreconcilable differences," Christina's estranged husband has not been involved in the program.

Christina Anstead, the star of "Christina on the Coast," finalized her divorce from Ant Anstead in June 2021. The former couple, who share custody of their 5-year-old son, Hudson, have amicably parted ways.

Tarek and Heather shared their experience of working with his ex-wife in a video on social media while filming their new reality show. Tarek tried to contact Christina via phone but his calls went unanswered. Heather joked, "She must have blocked you."

At Kathy Hilton's holiday event, Heather revealed to Planet Chronicle Digital that her online banter with Christina is just for fun and they are enjoying themselves.

Heather stated, "We're filming the show together, everyone gets along, we're raising kids together, and it doesn't happen overnight."

Heather El Moussa made an effort to develop a relationship with her husband's former wife, Christina Hall.

"Obviously, many events have transpired, but time has healed many of them, and I believe everyone is currently in a positive state of mind and getting along well. That's the most crucial aspect."

"I mean, obviously, a lot of things have happened, but time heals a lot of things, and I feel like everyone is in a really good place right now and getting along … and that's the most important." — Heather El Moussa

The couple, who were once married, now co-parent their two children together amicably and are working on "The Flip Off," but their relationship was vastly different years ago when their marriage ended in 2018.

"Tarek revealed to E! News that he and his family were upset with each other. He was upset that she left him, while she was upset with his behavior. Despite having to work together, it took a significant toll on their family."

He added, "Time heals. And enough time has passed to where all the anger and rage and negative thoughts have finally dissipated.

"Tarek stated that co-parenting is impossible if one is angry and holding grudges against their former spouse. Forgiveness is necessary to move forward, and it should be done for the sake of the children."

In his 2024 memoir, "Flip Your Life: How to Find Opportunities in Distress – In Real Estate, Business and Life," he revealed his struggles with anxiety and depression and the end of their marriage.

Tarek was struggling with mental health issues and also had an addiction to steroids. At some point, he sought advice from an "anti-aging specialist" who recommended hormone injections.

WATCH: HGTV star Tarek El Moussa complains about this one holiday tradition

"El Moussa confessed to Planet Chronicle Digital last year that he knew something was off, but he had already done too much damage. He had planned to see a different doctor and figure out what was wrong with him, but it was too late."

Tarek came to terms with the unfairness of life after hitting rock bottom and started working on building a new one.

At the time, he told Planet Chronicle Digital that he knew it would be challenging, take a long time, and not be easy, but he had no other options, so he got to work.

In 2021, he found love again and married former Playboy model Heather. They welcomed their son, Tristan, in 2023.