First stills from Sam Mendes’ four-part Beatles film released in Liverpool

Postcards showing Paul Mescal, Harris Dickinson, Joseph Quinn and Barry Keoghan in character were printed as postcards and secreted around the performing arts school co-founded in the city by Paul McCartney

Pictures of the stars of Sam Mendes' forthcoming four-part Beatles film in character as the musicians have been published, offering a first look at the actors in costume.

The pictures were released in postcard form at the Liverpool Institute for Performing Arts, the school co-founded by Paul McCartney which occupies the premises formerly occupied by the Liverpool Institute High School for Boys, where both McCartney and future bandmate George Harrison were pupils.