Washington DC, Dec. 16 -- The makers have released the first trailer of Steven Spielberg's upcoming film 'Disclosure Day' on Tuesday. It stars Emily Blunt and Josh O'Connor in the lead roles.

Apart from the lead cast, the film also stars Colin Firth, Eve Hewson, Colman Domingo, Wyatt Russell and Henry Lloyd-Hughes.

Spielberg developed the science fiction story with screenwriter David Koepp, who previously collaborated with the director as a writer on 'Jurassic Park,' 'Jurassic Park: The Lost World,' 'War of the Worlds' and 'Indiana Jones and the Kingdom of the Crystal Skull.'

Here's the logline: "If you found out we weren't alone, if someone showed you, proved it to you, would that frighten you? This summer, the truth belongs to seven ...