(Image source from: All is not well between Jennifer Aniston-Justin Theroux})

One of Hollywood's most-talked about pair, Jennifer Anniston and Justin Theroux, have been engaged for 18 months now, and there are no chimes of wedding bells yet. This has  fanned a cloud  of doubt over the possible union of the two, since both are leading separate lives and have been spending most of their times apart.

Jen didn't accompany Justin to co-star Phillip Seymour Hoffman's funeral nor did he join her for her 45th birthday bash in New York.

'It's absolutely indicative of the status of Jen and Justin's relationship,' an insider said.

'There is absolutely no wedding talk or planning going on. Publicly the couple is saying it's because they are just too busy with work, but if they wanted to get married, it would happen.'

'The relationship is definitely at an impasse,' the source continued. 'Either it's going to fizzle out, which seems likely, or they get married. Jen is extremely insecure and very needy. Justin is the opposite, very laid back and low maintenance.'

The 'Friends' favorite started dating Justin back in May 2011 on the set of their flick, 'Wanderlust'.  Theroux proposed to her on his 41st birthday in August 2012.

When Justin isn't working, he spends most of his time hanging with his newly single pal Orlando Bloom.

Does that raise a suspicion that all is not well between Jennifer-Justin? Well, definitely!

AW: Suchorita Choudhury