Emily Blunt and Josh O'Connor Hand in Hand at London Photocall for 'Disclosure Day'

Emily Blunt and Josh O'Connor made an appearance at the photocall for their forthcoming sci-fi thriller this week, arriving hand in hand for the event held at Rose Court in London on Friday, June 5.

The pair were joined by fellow cast members Colman Domingo, Colin Firth, Wyatt Russell, and Eve Hewson. Director Steven Spielberg was also on hand for the occasion.

The ensemble has been in full promotional mode over the past several weeks, taking their campaign for the film around the world. Just the day prior, the cast gathered for the UK premiere of the project in London.

The film centers on a provocative premise: "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 eight billion people. We are coming close to … Disclosure Day."

The movie is set to arrive in theaters on June 12. Blunt stepped out in a striking Erdem dress for the photocall.