Suggestions by @christabodhi

Chris Hemsworth

as Thorn (voice) in The Inheritance Cycle (Eragon Series)

James Franco

as Firnen (voice) in The Inheritance Cycle (Eragon Series)

Dave Bautista

as Yarbog in The Inheritance Cycle (Eragon Series)

Macaulay Culkin

as The Twins in The Inheritance Cycle (Eragon Series)

Julia Roberts

as Saphira(voice) in The Inheritance Cycle (Eragon Series)

Charlize Theron

as The Razac in The Inheritance Cycle (Eragon Series)

Ming-Na Wen

as Queen Islanzadí in The Inheritance Cycle (Eragon Series)

Robert Sheehan

as Solembum in The Inheritance Cycle (Eragon Series)

Samuel L. Jackson

as King Orrin in The Inheritance Cycle (Eragon Series)

Danny DeVito

as King Hrothgar in The Inheritance Cycle (Eragon Series)

Sadie Sink

as Katrina in The Inheritance Cycle (Eragon Series)

Danny DeVito

as King Orrin in The Inheritance Cycle (Eragon Series)

Sean Connery

as Gladr (voice) in The Inheritance Cycle (Eragon Series)

Vincent D'Onofrio

as Nar Garzhvog in The Inheritance Cycle (Eragon Series)

Donnie Yen

as Oromis in The Inheritance Cycle (Eragon Series)

Adam Driver

as Shruikan (voice) in The Inheritance Cycle (Eragon Series)

Lucy Liu

as Queen Islanzadí in The Inheritance Cycle (Eragon Series)

Maggie Smith

as Angela in The Inheritance Cycle (Eragon Series)

Fan Bingbing

as Arya in The Inheritance Cycle (Eragon Series)

Hayden Christensen

as Galbatorix in The Inheritance Cycle (Eragon Series)