Film, written by Richard Curtis, features celebrities including Nadiya Hussain, Gillian Anderson and Sir Bradley Wiggins. Public Health England and the NHS have launched a celebrity-backed film that will broadcast simultaneously on ITV, Channel 4, Channel 5 and Sky to encourage the public to use its "Every mind matters" mental-health platform. Coming ahead of World Mental Health Day on Thursday (10 October), the three-minute film was written by Richard Curtis and directed by Rankin. It will air at 8.45pm tonight (7 October). A 60-second trailer for the spot has gone live ahead of its debut. The film is voiced by the Duke and Duchess of Cambridge and Duke and Duchess of Sussex, and stars celebrities including Gillian Anderson, Davina McCall, Glenn Close, Sir Bradley Wiggins, Andrew Flintoff, Professor Green and Nadiya Hussain. It was created by 23red, APS, Freuds, M&C Saatchi, Manning Gottlieb OMD and Wavemaker. The drive is also backed by a number of major brands, charities and employers, which have pledged to promote the platform for staff, customers and followers. These include Santander, Greggs, Three, the England and Wales Cricket Board, Mind, Time to Change and the Samaritans.