Jennifer Aniston and Justin Theroux are reportedly having wedding troubles again since she's on the West Coast while her fiance is in New York City.

"Jen always used to be the one who was working nonstop on films while Justin was writing and producing," a friend of the couple reportedly told InTouch magazine. "But now that he's both filming and producing, their dynamic has changed. It's not Justin's fault - he wants to work more again. But it's caused them to drive apart and spend much less time together."

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The source also added that the "distance could tear them apart for good," but the We're The Millers actress is trying her best to make the relationship last.

"She wants to make the relationship work, but she knows there's only so much she can do," the friend reportedly said. "Don't be surprised if things end sooner rather than later."

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This isn't the first time the two Wanderlust co-stars, who got engaged in 2012, have been accused of having relationship problems. The couple is constantly in the tabloids with reports that their relationship is on the rocks. But, Aniston previously debunked all the fabrications and said the couple is happily in love.

"We have yet to set any dates. There have been no canceled weddings. There have been no postponed weddings. There have been no arguments about where to get married. Just clearing all that up," the 44-year-old actress told The New York Daily News in July. "We just want to do it when it's perfect, and we're not rushed, and no one is rushing from a job or rushing to a job... and, you know, we already feel married."

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Jennifer Aniston, Justin Theroux