Brad Pitt and James Gray have been trying for years to get the stars and their schedules to align to work together. The once mooted assassin movie “The Gray Man” and “The Lost City Of Z” both went through periods where Pitt and Gray were going to collaborate, but for various reasons, they just couldn’t come together. But now, they are pairing up on a project that sounds tremendously exciting.

A couple months back it was reported that Pitt was circling Gray’s sci-fi flick “Ad Astra,” and the director confirms the film is going ahead, with cameras rolling very soon. Finally, Pitt and Gray will get to make a movie.

READ MORE: James Gray Discusses ‘The Lost City Of Z,’ Moviemaking & More In New 40-Minute Talk

“I’m terrified by it. The science-fiction genre is so tricky because there are elements of fantasy usually involved, and there are also fantastical elements. What I’m trying to do is the most realistic depiction of space travel that’s been put in a movie and to basically say, ‘Space is awfully hostile to us.’ It’s kind of a ‘Heart of Darkness‘ story about traveling to the outer edge of our solar system. I have a lot of hopes for it but it is certainly ambitious… It starts shooting July 17th, so not too far away,” the director told Collider.

It’s another interesting clue about the movie, which follows a slightly autistic space engineer who embarks on a one-way trip to Neptune to find out why his father’s previous mission to find signs of intelligent life failed.

His latest film, “The Lost City Of Z,” is now playing.

Bonus: Listen to this 1 hour podcast chat about the film industry, state of film and more.