Born to twin sisters on the same day in London, France and Margaret are more like brother and sister than cousins. The close relationship between the cousins is suspended when Margaret is sent abroad for schooling. Now a young woman, Margaret returns to London and resumes her intimate connection with France.
Unfortunately the movie The Buttercup Chain is not yet available on HBO Max.
| Directing | Robert Ellis Miller | Director |
| Writing | Peter Draper | Writer |
| Writing | Janice Elliott | Novel |
| Production | Leslie Gilliat | Executive Producer |
| Production | Philip Waddilove | Producer |
| Production | John Whitney | Producer |
| Editing | Thelma Connell | Editor |
| Art | Wilfred Shingleton | Production Design |
| Art | Fred Carter | Art Direction |
| Costume & Make-Up | Gabriella Falk | Costume Design |
| Costume & Make-Up | Philip Leakey | Makeup Artist |
| Costume & Make-Up | Richard Mills | Makeup Artist |
| Sound | Chris Greenham | Sound Editor |
| Sound | Paul Le Mare | Sound Recordist |
| Sound | Doug E. Turner | Sound Recordist |
| Sound | Ron Conley | Boom Operator |
| Camera | Douglas Slocombe | Director of Photography |
| Sound | Richard Rodney Bennett | Original Music Composer |
