Taron Egerton as Gary 'Eggsy' Unwin

Colin Firth as Harry Hart / Galahad

Samuel L. Jackson as Valentine

Mark Strong as Merlin

Sophie Cookson as Roxy

Sofia Boutella as Gazelle

Michael Caine as Arthur

Edward Holcroft as Charlie

Hanna Alström as Princess Tilde

Samantha Womack as Michelle Unwin

Mark Hamill as Professor Arnold

Jonno Davies as Lee

Jack Davenport as Lancelot

Adrian Quinton as Terrorist

Alex Nikolov as Little Eggsy

Velibor Topic as Big Goon

Geoff Bell as Dean

Jordan Long as Poodle

Theo Barklem-Biggs as Ryan

Tobi Bakare as Jamal

Morgan Watkins as Rottweiler

Paul Kennington as Barman

Ralph Ineson as Policeman

Nicholas Banks as Digby

Jack Cutmore-Scott as Rufus

Nicholas Agnew as Nathaniel

Rowan Polonski as Piers

Tom Prior as Hugo

Fiona Hampton as Amelia

Bjørn Floberg as Scandinavian Prime Minister

Johanna Taylor as Valentine's Assistant 1

Lily Travers as Lady Sophie

Richard Brake as The Interrogator

Andrew Bridgmont as Kingsman Tailor

Corey Johnson as Church Leader

Anne Wittman as Church Blonde Woman

Andrei Lenart as Arctic Guard

Simon Green as Valentine's Butler

Lazara Storm as Valentine's Assistant 2

Sarah Hewson as Sky News Reader

Jayne Secker as Sky News Reader

Lukwesa Burak as Sky News Reader

James Clayton as Kingsman Knight

Nick English as Kingsman Knight

Charles Filmer as Kingsman Knight

Bimbo Hart as Kingsman Knight

Chester King as Kingsman Knight

Alastair MacIntosh as Kingsman Knight

Carlos Peres as Kingsman Knight

Jude Poyer as Church Goer (uncredited)

Daniel Chapple as Business Elite (uncredited)