WARNING: This article contains major Grimm Season 3 SPOILERS from previous episodes!

During the first half of Grimm Season 3, fans saw how Nick (David Giuntoli) and Juliette's (Bitsie Tulloch) relationship are starting to go back to the way it was.

From being kept in the dark (Season 1) to losing her mind (Season 2), Juliette is now starting to become comfortable on Nick's true identity (as a Grimm).

Juliette even takes a step further by becoming close to Nick's Wesen's friends like Rosalee (Bree Turner) and Monroe (Silas Weir Mitchell).

There are even several instances where Juliette helps Nick solving "Grimm-related" problems.

While fans only want the best for both Nick and Juliette, their happy relationship may not last very long.

Earlier this month, Grimm Season 3 star David Giuntoli had a press interview where he revealed some interesting details about his character's relationship with Juliette.

When asked if there will be "more problems between [Nick and Juliette], Giuntoli answered, "Oh, there's no way we're going to live happily ever after."

Does this mean Nick and Juliette aren't truly meant for each other? But, then Giuntoli also said, "I don't know what's going to happen, but if there is a relationship - it is the job of the writers of America to tear it apart, at least temporarily. So I don't know what's going to happen, but I can guarantee you there's going to be something thrown into the works here. I just don't know what that is yet."

So, Juliette and Nick will definitely going to face some major problems this season. Whatever that is, viewers can only guess.

Tulloch also had a recent interview with Joshua Maloni of Niagara-Wheatfield Tribune where she shared some details about Juliette's relationship with Nick.

"It just feels like they have this really comfortable report. ... And it just sort of feels like they're just comfortable - like (a) little old married couple - and they really love each other a lot," Tulloch Told Maloni.

"And I think that, you know, with the new storyline with Juliette getting involved more, you know, he's going to look at her in a different light, because he didn't realize that she was such - kind of a badass. And you're going to see more of that. And I think that he is - there's going to be scenes where he's like a little impressed. He's like, 'Oh crap, I didn't even know this side of her. Look at this. This is interesting," Tulloch added.

What do you think will be the cause of Juliette and Nick's problem? Tell us by commenting below!

Tune in here for more Grimm Season 3 SPOILERS!

Grimm Season 3 will return on January 3, 2014 on NBC. Watch promo teaser clip below: