Jennifer Aniston and Justin Theroux are reportedly having relationship troubles over "Zoolander 2."

In a report from Radar Online, Jennifer Aniston and Justin Theroux are working on "Zoolander 2" and she's already regretting that decision.

The source claimed, "Jen's ready to pull the plug on her cameo after 'an inch became a mile' with Justin's demands."

"Justin and Ben want to go to ComicCon and do some publicity stunts for the movie and he's been begging her to get involved. Jen's already agreed to do a small cameo in the movie, but lining her up for some cheap publicity trick is not how she wants to roll anymore," the source added.

However, Justin Theroux "kept pushing the issue" and that lead to the relationship troubles as Jennifer Aniston "lost it" and told him that he might have forgotten who she is and it's not "some on-call piece of arm candy."

Last month, the tabloid Star Magazine, as shared by Belfast Telegraph, also reported relationship troubles between Jennifer and fiancé Justin Theroux as the couple is "in a terrible place right now."

"They are never together, and even when they are together they fight nonstop," the source claimed.

Their fights seemed to be centered on Jennifer Aniston's suspicions that Justin Theroux is allegedly cheating with one of the crew of "The Leftovers," which is also the reason why he didn't want him to visit the set.

The source said, "[He was] adamantly against it because he didn't want the stress of having to deal with her while working on an important project. "He started realizing that he's enjoying his independence, he is in no hurry."

Us Weekly reported that the delay of the wedding date can be attributed to the prenup that is yet to be signed by Jennifer Aniston and Justin Theroux.

What's at stake is over $110 million.

"The document is allegedly being amended to reflect the future earnings Jennifer, 45, may receive in 'Friends' royalties from 'Netflix.' The on-demand TV streaming service released all 10 seasons of the hit sitcom on their website on Jan. 1," Closer Weekly added.