When a group of rebellious deejays decides to defy the ban on government-censored music, they take to the seas to broadcast music and mayhem to millions of adoring fans.
| Actor | Role |
|---|---|
 Tom SturridgeCarl | Carl |
 Philip Seymour HoffmanThe Count | The Count |
 Rhys IfansGavin | Gavin |
 Bill NighyQuentin | Quentin |
 Emma ThompsonCharlotte | Charlotte |
 Nick FrostDave | Dave |
 Kenneth BranaghDormandy | Dormandy |
 January JonesEleonore | Eleonore |
 Gemma ArtertonDesiree | Desiree |
 Jack DavenportTwatt | Twatt |
 Rhys DarbyAngus | Angus |
 Chris O'DowdSimon | Simon |
 Katherine ParkinsonFelicity | Felicity |
 Katie LyonsAngus' Boat Girl | Angus' Boat Girl |
 Tom WisdomMark | Mark |
 Will AdamsdaleNews John | News John |
 Tom BrookeThick Kevin | Thick Kevin |
 Ralph BrownBob | Bob |
| IIke HamiltonHarold | Harold |
 Sinéad MatthewsMiss C | Miss C |
 Talulah RileyMarianne | Marianne |
 Michael HadleyMr. Roberts | Mr. Roberts |
 Charlie RoweJames | James |
 Lucy FlemingMrs. Roberts | Mrs. Roberts |
 Ian MercerTransfer Boatman | Transfer Boatman |
 Francesca LongriggMrs. Dormandy | Mrs. Dormandy |
 Poppy DelevingneModel | Model |
 David SterneMarianne's Captain | Marianne's Captain |
 Olivia LlewellynMargaret | Margaret |
| WWilliam IlkleyCommanding officer | Commanding officer |