 | Richard E. Grant als Withnail |
 | Paul McGann als ...& I |
 | Richard Griffiths als Monty |
 | Ralph Brown als Danny |
 | Michael Elphick als Jake |
 | Daragh O'Malley als Irishman |
 | Michael Wardle als Isaac Parkin |
| Una Brandon-Jones als Mrs. Parkin |
| Noel Johnson als General |
| Irene Sutcliffe als Waitress |
 | Llewellyn Rees als Tea Shop Proprietor |
| Robert Oates als Policeman 1 |
 | Anthony Wise als Policeman 2 |
| Eddie Tagoe als Presuming Ed |
| Bruce Robinson | Director |
| Bruce Robinson | Screenplay |
| Paul M. Heller | Producer |
| George Harrison | Executive Producer |
| Denis O'Brien | Executive Producer |
| David Dundas | Music |
| Rick Wentworth | Music |
| Peter Hannan | Director of Photography |
| Alan Strachan | Editor |
| Michael Pickwoad | Production Design |
| Henry Harris | Art Direction |
| Andrea Galer | Costume Design |
| Peter Frampton | Makeup Artist |
| Alan Paley | Sound Editor |
| Lawrence Kirstein | Associate Producer |
| David Wimbury | Co-Producer |
| Mary Selway | Casting |
| Sue Love | Hairdresser |
| Matthew Binns | Unit Production Manager |
| Peter Kohn | First Assistant Director |
| Kathy Sykes | Second Assistant Director |
| Alan Chesters | Carpenter |
| Bert Gadsden | Property Master |
| Trevor Rutherford | Boom Operator |
| Clive Winter | Sound Mixer |
| Martin Gutteridge | Special Effects Supervisor |
| Paul Heasman | Stunt Double |
| Bruce Robinson | Stunt Double |
| Murray Close | Still Photographer |
| Perry Evans | Electrician |
| Ian Foster | Clapper Loader |
| Don Maton | Electrician |
| Reg Parsons | Gaffer |
| Bob Smith | Camera Operator |
| Brian Sullivan | Electrician |
| Shaun Wyldeck-Estrada | Wardrobe Master |
| Bob Mullen | Assistant Editor |
| Anne Sopel | Assistant Editor |
| Jeremy Strachan | Assistant Editor |
| Tony Tromp | Assistant Editor |
| Sally Jones | Script Supervisor |
| Joanna Campling | Unit Publicist |
| Valerie Craig | Production Coordinator |
