Justin Theroux described himself as "the luckiest guy in the world," and if you take one look at him and Jennifer Aniston in Paris, you will understand why.

The pair took to the streets of the romantic city this week hand-in-hand and packing on the PDA.

Following months of wedding rumours, the pair weren't helping dispel the "are they, aren't they" speculation when Jen, 43, was spotted wearing a gold ring on her left hand ring finger and Justin, 40, appeared to be wearing a matching one.

Although there's no confirmation from the couple, these pictures of the pair leaving Le Stresa restaurant in the city's 8th arrondissement following a romantic dinner, show that they are certainly loved-up.

Before jetting off on a private plane for the romantic trip, Justin, who co-wrote Rock of Ages, spoke about his high-profile relationship at the movie's Los Angeles premiere saying he "couldn’t be happier".

"I always go to bed thinking I’m the luckiest guy in the world," he said.

Although Justin doesn’t give too much away when it comes to their relationship, Jen isn't so shy.

"He’s a protector, for sure,” she told Marie Claire Australia.

“He’s just a good human being, and so funny.”