10 Cloverfield Lane: listen out for the uncredited voice of an Oscar nominee

Mild spoilers follow - you have been warned

In a film already so shrouded in secrecy, 10 Cloverfield Lane is sure to contain many surprises - one of which includes the voice cameo of a particular Hollywood A-list actor.

For those of you wanting to listen out for it, you won't have to stay alert for too long - the cameo in question occurs near the film's start in a scene which sees the protagonist Michelle (Mary Elizabeth Winstead) leave her fiancé, Ben.

Now, the audience doesn't see Ben instead only hearing him shout off-camera - but he does have a particularly recognisable voice; specifically that of Oscar-nominee Bradley Cooper.

Revealed by Slash Film, director Dan Trachtenberg told them: "JJ and [Cooper] go way back, they had worked on Alias together. And just one random day, we still didn't have a voice for the role, and JJ thought, 'Hey, I wonder if Bradley would want to do this'.

"And we were like, 'Bradley?' and he's like, 'Cooper'. And we were like, 'Oh, cool!' So yeah, he called him up and he was stoked to help us out. It was really cool."

JJ Abrams serves as producer on 10 Cloverfield Lane, a sequel-of-sorts to Cloverfield, which was announced via the unexpected release of a trailer earlier this year. Reportedly, not even the film's cast knew it was related to Matt Reeves' 2008 hit during filming. The film also stars John Goodman and John Gallagher Jr.

In promotion of the film, the filmmaker commented on his time directing Star Wars:The Force Awakens, admitting he made an error in a particular scene involving General Leia and Chewbacca.

10 Cloverfield Lane, co-starring John Goodman and John Gallagher Jr., is released 18 March.