Eddie Redmayne as Dug (voice)

Tom Hiddleston as Lord Nooth (voice)

Maisie Williams as Goona (voice)

Timothy Spall as Chief Bobnar (voice)

Miriam Margolyes as Queen Oofeefa (voice)

Rob Brydon as Message Bird / Brian / Bryan / Gonad the Gaul (voice)

Kayvan Novak as Dino / Jurgend (voice)

Richard Ayoade as Treebor (voice)

Selina Griffiths as Magma / Additional Voice (voice)

Johnny Vegas as Asbo (voice)

Mark Williams as Barry (voice)

Gina Yashere as Gravelle (voice)

Rich Webber as Grubup (voice)

Simon Greenall as Eemak / Thongo / Additional Voice (voice)

Nick Park as Hognob (voice)

Luke Walton as Hügelgraber / Additional Voice (voice)

Antony Bayman as Additional Voices (voice)

Richard Beek as Additional Voices (voice)

Tom Doggart as Additional Voices (voice)

Tim Hands as Additional Voices (voice)

Adrian Rhodes as Additional Voices (voice)

Victoria Stevens as Additional Voices (voice)

Ben Whitehead as Additional Voices (voice)