Onder andere met: Colin Firth (Harry Hart / Galahad), Taron Egerton ( Gary 'Eggsy' Unwin), Mark Strong (Merlin), Jonno Davies (Lee), Jack Davenport (Lancelot), Samuel L. Jackson (Valentine), Sofia Boutella (Gazelle), Michael Caine (Arthur), Geoff Bell (Dean), Jordan Long (Poodle), Theo Barklem-Biggs (Ryan), Tobi Bakare (Jamal), Morgan Watkins (Rottweiler), Edward Holcroft (Charlie), Sophie Cookson (Roxy), Nicholas Banks (Digby), Jack Cutmore-Scott (Rufus), Nicholas Agnew (Nathaniel), Fiona Hampton (Amelia), Tom Prior (Hugo), Hanna Alström (Princess Tilde), Mark Hamill (Professor Arnold)