Suggestions by @computeyd

John Goodman

as Vervain in Watership Down

Jonathan Banks

as Captain Campion in Watership Down

Maggie Gyllenhaal

as Clover in Watership Down

Isabella Rossellini

as Haystack in Watership Down

Jon Bernthal

as Blackavar in Watership Down

Giancarlo Esposito

as Holly in Watership Down

Giancarlo Caltabiano

as Holly in Watership Down

Wil Wheaton

as Silver in Watership Down

Liam Neeson

as Buckthorn in Watership Down

Thomas Mann

as Speedwell in Watership Down

Michael Rooker

as General Woundwort in Watership Down

Mark Hamill

as Black Rabbit of Inle in Watership Down

Cary Elwes

as Prince Rainbow in Watership Down

Roberto Benigni

as The Mouse in Watership Down

Jim Parsons

as Blackavar in Watership Down

Arnold Schwarzenegger

as Kehaar in Watership Down

John Carroll Lynch

as Thistle in Watership Down

J.K. Simmons

as Captain Charlock in Watership Down

Viggo Mortensen

as Ragwort in Watership Down

Sean Penn

as Marjoram in Watership Down