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

Mark Hamill
as Professor Arnold

Samantha Womack
as Michelle Unwin

Jonno Davies
as Lee Unwin

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

Edward Holcroft
as Charlie

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

Hanna Alström
as Princess Tilde

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

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)