First trailer for Insidious: The Red Door has just dropped

Just when you thought the Insidious franchise couldn't get any more terrifying, it's gone and dropped the trailer for The Red Door.

2010 with the first instalment of the franchise.

Original cast members Patrick Wilson, Rose Byrne, Ty Simpkins, and Lin Shaye are all set to return, though The Red Door will focus more on a father-son tale, set roughly a decade after the events in the original film.

As the title of the movie suggests, they take themselves behind the 'red door', and let me tell you now, it's not a good idea.

As if they haven't already been through enough, they're set to encounter a 'host of new and more horrifying terrors' - so buckle in.

As well as starring in the film, Wilson is making his feature film directorial debut after having taken over from original director James Wan.

The star admitted he was initially reluctant to try and follow in Wan's footsteps, but the notion of directing an Insidious film proved too good to resist.

“I think I was scared of trying to fit in James' shoes and Leigh’s and gosh, the comparisons. Ultimately, that lasted for about 24 hours,” Wilson told IGN.

He continued: “I started to think about the story and the kind of story that I would want to tell. The more I thought about it, kind of like with acting choices … if a role makes me uneasy and I can't wrap my head around it and it scares me to do it, then usually that's a really good thing.

"My fear of wanting to step into this genre and specifically back into the Insidious world and take the reins, it lasted about 24 hours.”

Wilson has also received support from Wan, who told IGN he was 'thrilled' for Wilson to take the reins.

"It felt right that he was making the transition into directing, and I couldn’t be happier that he’s doing it with the Insidious franchise," Wan said.

Insidious: The Red Door is set to be released on 7 July.