Mirrorball and chain.

Jen Affleck’s estranged husband, Zac Affleck, was reportedly a “nightmare on set” while the “Secret Lives of Mormon Wives” star competed on “Dancing With the Stars” Season 34 last year, a production source told the US Sun.

The insider claimed Zac “didn’t allow” Jen’s pro partner, Jan Ravnik, to “fully do his job and made things very uncomfortable.”

“Jan was a total professional and dealt with it, but Zac was much more controlling than any other partner that season,” the source alleged. “Even crew members felt they had to tiptoe around him because he was constantly upset over something.”

Zac, 30, also reportedly barred Jen, 27, from doing certain dance moves and wearing specific costumes.

“He asserted his dominance and tried to dictate,” the insider told the outlet.

“Poor Jan was trying to do his job well as a first-time pro and he had a very stressful experience, largely because of Zac.”

Reps for Jen, Zac and “Dancing with the Stars” did not immediately respond to Page Six’s requests for comment.

Last week, we confirmed that Jen filed for divorce from Zac on Nov. 3 in Utah after seven years of marriage and three children together — and a fourth on the way.

While most details surrounding the divorce remain sealed, Page Six learned that Jen included a proposed parenting plan in her filing.

The estranged couple met on the Mormon dating app Mutual in 2018 and got married in 2019.

They went on to welcome Nora, 4, Lucas, 3, and Penelope, 1, and Jen is currently pregnant with their fourth baby.

Jen and Zac have been open about the struggles within their marriage on “The Secret Lives of Mormon Wives.”

During a sitdown during Season 4, Zac complained that Jen “being a wife” had “taken a back-burner” while she was competing on “Dancing With the Stars.”

He was also upset about a segment Jen and Ravnik, 31, filmed in Disneyland for the competition show’s annual “Disney Night.”

“Jan’s a great guy. I have no issues with Jan. [He’s] super respectful,” Zac said. “But I’m sitting there walking through Disneyland, watching my wife dance in front of Cinderella’s castle with another man.

“It probably wasn’t my plan A, or plan B or C,” he continued.

Jen was eliminated from her season of “Dancing With the Stars” during Week 7 on “Halloween Night.”

However, Jen and Zac’s issues continued into “The Secret Lives of Mormon Wives” Season 5 as the latter struggled to support partner’s dreams of becoming an actress and modeling for Sports Illustrated.

The MomTok content creator is now slated to appear as a full-time cast member in Hulu’s upcoming “The Secret Lives of Mormon Wives: Orange County.”

The spinoff premieres Thursday.