Jennifer Aniston, Justin Theroux Split?

Jennifer Aniston and Justin Theroux have reportedly parted ways after over one year of dating, it has been claimed.

Aniston, 43, was allegedly been eager for an engagement ring throughout their relationship but Theroux, 40, was reportedly content with the way things were before the break-up, according to a new report.

"Jen said, 'I need a commitment, and I need it now,'" a source told Star Magazine. Only, instead of a dropping down to one knee and professing his love for her, Theroux reportedly shrugged his shoulders.

"That was the moment the writing was on the wall for Jen," the insider went on. "It crystallized in her mind that Justin isn't the one for her."

The claims follow previous reports that Theroux has been missing Heidi Bivens, his ex-girlfriend of 14 years, in recent months, creating trust issues for Aniston.

"Looking back, Jen never fully trusted Justin. Heidi and Justin have been talking for months, and Jennifer had no idea but she started getting suspicious," the insider explained.

Theroux reportedly dumped Bivens shortly before he began dating Aniston, although the "Friends" actress was said to be slightly uncomfortable that they maintained such a close friendship.

"To give her closure, Jen even had someone following Justin in New York while she was away," the source continued. "He got together with Heidi within days of Jen leaving. It seems like Justin couldn't wait to be rid of Jen so he could cut loose."

In a recent interview, the "Wanderlust" star boasted about his relationship with Aniston, insisting that he is very happy with the actress.

"I always go to bed thinking I'm the luckiest guy in the world," Theroux told "Extra," adding that he "couldn't be happier" with Aniston.

Aniston made similar statements during an interview with "Good Morning America," in which she referred to herself as being "lucky" to be with Theroux.

"Yes, I'm very happy. I'm extremely lucky, and I'm extremely happy," Aniston said told "GMA."