Taron Egerton as Gary "Eggsy" Unwin

Colin Firth as Harry Hart / Galahad

Samuel L. Jackson as Richmond Valentine

Mark Strong as Hamish Mycroft / Merlin

Sophie Cookson as Roxanne "Roxy" Morton / Lancelot

Sofia Boutella as Gazelle

Michael Caine as Arthur / Chester King

Hanna Alström as Princess Tilde

Samantha Womack as Michelle Unwin

Mark Hamill as James Arnold

Jonno Davies as Lee Unwin

Jack Davenport as James Spencer / Lancelot

Adrian Quinton as Terrorist

Alex Nikolov as Young Eggsy Unwin

Velibor Topic as Big Goon

Geoff Bell as Dean Anthony Baker

Jordan Long as Poodle

Theo Barklem-Biggs as Ryan

Tobi Bakare as Jamal

Edward Holcroft as Charlie Hesketh

Morgan Watkins as Rottweiler

Lily Travers as Lady Sophie

Paul Kennington as Barman

Ralph Ineson as Policeman

Nicholas Banks as Digby Barker

Jack Cutmore-Scott as Rufus

Nicholas Agnew as Nathaniel

Rowan Polonski as Piers

Tom Prior as Hugo Higins

Fiona Hampton as Amelia

Bjørn Floberg as The King of Sweden

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

Johanna Taylor as Valentine's Assistant 1

Lazara Storm as Valentine's Assistant 2

Simon Green as Valentine's Butler

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)