Hannah Waddingham as Narrator (voice)

Lolly Adefope as Miss Skate (Voice)

Jayde Adams as Plaice (voice)

Rob Brydon as Fisherman / Whale / Starfish / Anchovy (voice)

Reuben Kirby as Tiddler (voice)

Theo Fraser as Johnny Dory (voice)

Paul Thornley as Lobster (voice)

Andy Martin as Seal (voice)

Lizzie Waterworth as Additional Voices (voice)