Ed Speleers ... Eragon
Jeremy Irons ... Brom
Sienna Guillory ... Arya
Robert Carlyle ... Durza
John Malkovich ... Galbatorix
Garrett Hedlund ... Murtagh
Alun Armstrong ... Uncle Garrow
Christopher Egan ... Roran (as Chris Egan)
Gary Lewis ... Hrothgar
Djimon Hounsou ... Ajihad
Rachel Weisz ... Saphira (voice)
Richard Rifkin ... Horst
Steve Speirs ... Sloan
Joss Stone ... Angela
Michael Mehlmann ... Villager #1 (as Michael A. Mehlmann)
Tamas Deak ... Villager #2
Matt Devere ... Tall Soldier
Mate Haumann ... Sergeant
Andrea Fazekas ... Horst's Wife
Caroline Chikezie ... Nasuada
Agnes Banfalvy ... Varden Woman
Pal Makrai ... Varden Guard
Spencer Wilding ... Razac #1
Gabor Hortobagyi ... Razac #2
Maggie Baird ... (voice)
Johnny Gidcomb ... (voice) (as John Gidcomb)
Peter Lavin ... (voice)
Randall Montgomery ... (voice)
Paula J. Newman ... (voice) (as Paula Jane Newman)
Mark Silverman ... (voice)
Julian Barnes ... (voice)
Tony Armatrading ... (voice) (as Anthony Armatrading)
Diane Mercer ... (voice) (as Deanne Mercer Dennis)
Melissa Bickerton ... (voice)
Kenneth Danziger ... (voice)
Peter Dennis ... (voice)
Neil Dickson ... (voice)
Jean Gilpin ... (voice)
Martin Jarvis ... (voice)
Sean Mahon ... (voice)
Kevin Owers ... (voice)
Warren Press ... (voice)
Darren Richardson ... (voice)
Ian Ruskin ... (voice)
Alan Shearman ... (voice)
Julian Stone ... (voice)
Mark Sussman ... (voice)
Diz White ... (voice)
Sean Connolly ... Urgal Warrior (uncredited)
Tamsin Egerton ... Katrina (uncredited)