Cast (in credits order) complete, awaiting verification
| Amma Asante | ... | Self - Director | |
| Gugu Mbatha-Raw | ... | Self / Dido Elizabeth Belle | |
 |
Damian Jones | ... | Self - Producer |
| Tom Wilkinson | ... | Self / Lord Mansfield | |
| Misan Sagay | ... | Self - Writer | |
| Tom Felton | ... | Self / James Ashford | |
| Rest of cast listed alphabetically: | |||
| Sarah Gadon | ... | Elizabeth Murray (archive footage) (uncredited) | |
| Matthew Goode | ... | Captain Sir John Lindsay (archive footage) (uncredited) | |
|
|
Cara Jenkins | ... | Young Elizabeth (archive footage) (uncredited) |
|
|
Lauren Julien-Box | ... | Young Dido (archive footage) (uncredited) |
| Bethan Mary-James | ... | Mabel (archive footage) (uncredited) | |
| Sam Reid | ... | John Davinier (archive footage) (uncredited) | |
| Miranda Richardson | ... | Lady Ashford (archive footage) (uncredited) | |
| Emily Watson | ... | Lady Mansfield (archive footage) (uncredited) | |
| Penelope Wilton | ... | Lady Mary Murray (archive footage) (uncredited) | |
| Andrew Woodall | ... | Lord Mayor (archive footage) (uncredited) | |