Steve Coogan as Sir Richard McCreadie

David Mitchell as Nick

Isla Fisher as Samantha McCreadie

Asa Butterfield as Finn McCreadie

Sophie Cookson as Lily McCreadie

Shirley Henderson as Margaret

Sarah Solemani as Melanie

Jamie Blackley as Young Richard McCreadie

Stephen Fry as Self

Asim Chaudhry as Frank the Lion Tamer

Pearl Mackie as Cathy

Tim Key as Sam

Shanina Shaik as Naomi

Charlie Cooper as Neil

Jonny Sweet as Jules

Ollie Locke as Fabian

Christophe de Choisy as François

Matt Bentley as Adrian McCreadie

Dinita Gohil as Amanda

Michel Alexandre Gonzalez as Retail Shopping Center Worker

Joe Tucker as Manager

Jill Buchanan as Shopper

Karishma Navekar as Employee

Richard Betts as Bob the Banker

Manolis Emmanouel as Demetrious

Stephen Evans as Store Manager

Ben Hickey as Young Adrian

Harry Tayler as Young Finn

Will Smith as Teacher

Enzo Cilenti as Young Eric Weeks

Caroline Flack as Self

Paul Clayton as Headmaster

Jack Shepherd as Eric Weeks

James Blunt as Self

Jessica Fostekew as Sally

Paul Higgins as Jim McBride

Fatboy Slim as Self

Pixie Lott as Self

Paul Ritter as Lewis

Miles Jupp as Select Committee Chairman

Alexa Chung as Self

Louis Walsh as Self

Chris Martin as Self

Colin Firth as Self

Keith Richards as Self

Ben Stiller as Self

Keira Knightley as Self

Richard Attlee as Pride Jeans Supplier

Sumith Jayalath as Rickshaw Driver

Kevin Cruze as Factory Manager

Mahesh Dharmarathna as Another Factory Manager

Dominic Kellar as Yet Another Factory Manager

Natalie Gill as Adele Lookalike

Andy Penfold as Simon Cowell Lookalike

Gerry Trew as Rod Stewart Lookalike

Kristie Barton-Grimley as Kylie Minogue Lookalike

Robert Lamberti as George Michael Lookalike