FBI Special Agents Fox Mulder and Dana Scully are finally reunited on the big screen after six years apart.

The X-Files: I Want To Believe brings back actors David Duchovny and Gillian Anderson, following on from the last TV episode in 2002.

After years of teasing viewers with Mulder and Scully's will-they-won't-they romance, producers have released sneak peak pictures of the upcoming movie, hinting the couple may be getting close again.

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Will they or won't they?: A lingering moment between Special Agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson)

Duchovny has further confused X-Files fans by suggesting the intimate photo of the characters about to kiss was taken "as a joke".

On a mission: Studio 60 On The Sunset Strip actress Amanda Peet plays FBI Special Agent Dakota Whitney

When asked if the agents finally move their relationship from professional to personal, director Chris Carter mused: ""I would never say it was just a joke. The relationship does evolve.

"I know there was a planting of misinformation by producers. Therefore, it makes everything suspect, and I think that's a good thing."

Producers of the film are keeping the plot line secret, but have promised audiences the film will be scary.

Duchovny said: "It's very dark and frightening. We forgot, as we grew older and the show became so big, that it got so popular because it was that scary.

"This movie goes back to the original impetus of The X-Files, which is to scare the pants off people."

The Californication actor admitted it was strange acting with Anderson again after so many years and revealed the pair didn't really keep in contact over the hiatus.

He said: "We haven't really kept in touch. She moved to London, so we were in email touch a little bit. But I've only seen her since 2002 probably two or three times.

"I didn't understand what she said. She has an English accent now.

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On the case: After six years apart, Mulder is back with Scully

"No, I am just kidding. It was a highlight for me to work with her again.

"The first scene was just great. We immediately felt there was still a connection.

"It's almost like going back to a relationship you thought was over, so it's a little queasy at first.

"But what got me over that hesitation was the first scene I did with Gillian.

"Everything kind of clicked and that's when it really felt like, OK this is The X-Files, this is Mulder and Scully."

The movie also stars Billy Connolly as a dubious priest, Studio 60 On The Sunset Strip actress Amanda Peet as Dakota Whitney, and Pimp My Ride host and rapper Xzibit as an FBI agent.

The X-Files: I Want To Believe will hit British cinema screens on August 1st.

Taking the rap: Mulder is assisted by rapper Xzibit's FBI character