Jennifer Aniston and Justin Theroux are "bound to be" dogged by relationship rumours, say sources.
The Hollywood couple became an item in May 2011, getting engaged the following year. However despite a lengthy engagement there seems to be no plans to marry any time soon.
"There are bound to be rumours about their engagement, when they spend so much time apart," a source told British magazine Grazia. "Justin's been caught out referring to Jen as his 'girlfriend' or 'partner' rather than his fiancée, which has led some in their circles to wonder whether a wedding will ever materialise.
"With Jen and Justin both being evasive about the specifics - even to those close to them - it's natural for people to question what's going on. They both insist that they are committed to getting married, but it's beginning to sound increasingly hollow."
Their long-distance romance has been well documented, with Jennifer, 45, based in LA for movie commitments and 43-year-old Justin often in New York filming his hit TV show The Leftovers.
Rumours also started to circulate last week when Jennifer was snapped without her engagement ring on, leading people to question whether wedding plans were still on. Her rep disputed the claims, revealing the band had just been sent off to be cleaned.
"Cynics would point out that they've been engaged for two years, and Jen has never appeared without her ring before. It seems strange that she would suddenly choose to have it cleaned out of the blue, unless they were about to have a surprise wedding," the insider added.