Julian Barratt as Richard Thorncroft

Simon Farnaby as Clive Parnevik

Essie Davis as Patricia Deville

Steve Coogan as Peter Easterman

Richard McCabe as Jeffrey Moncrief

Andrea Riseborough as DC Elena Baines

Russell Tovey as Paul Melly

Robin Morrissey as PC Green

David Schofield as Chief Inspector Derek Newsome

Alannah Olivia as Casting Receptionist

Christopher Jenner Cole as Richard Crowthorne

Sean Foley as Kenneth Branagh's Producer

Jessye Romeo as Agent's Secretary

Harriet Walter as Richard's Agent

Simon Callow as Himself

Nicholas Farrell as Mayor

Jessica Barden as Jasmine

Tony Way as Dad with Newspaper

Lois Meleri-Jones as Peter Easterman's PA

Jordan Long as Vincent

Alex Duncan as News Reporter

Neil Edmond as Tannoy Man

Kenneth Branagh as Himself

Alex Wyndham as Jake