Alien: Covenant will be a "transformative" film for long-time fans of Sir Ridley Scott's sci-fi franchise, according to one cast member, Digital Spy said.

The upcoming film follows the crew of the Covenant to a seemingly desolate planet, where they discover the wreckage of the doomed Prometheus craft and its sole surviving crew member David (Michael Fassbender).

Scott's ensemble cast also includes Katherine Waterston and Carmen Ejogo, who spoke with Digital Spy at the UK premiere of Fantastic Beasts and Where to Find Them on Tuesday (November 15).

"[Katherine and I] both get to do really transformative things in both [Alien and Fantastic Beasts]," Carmen teased. "It's the best thing as an actress when you get to transform constantly.

"So for Katherine and I to get to do that together in two movies was quite a treat. Yeah, we definitely got to know each other."

Immense mystery surrounds Sir Ridley Scott's pseudo-prequel to the Alien franchise, which is tipped to introduce a new form of the terrifying Xenomorph creature.