Kate Winslet as Mary Anning

Saoirse Ronan as Charlotte Murchison

Gemma Jones as Molly Anning

James McArdle as Roderick Murchison

Alec Secăreanu as Dr. Lieberson

Fiona Shaw as Elizabeth Philpot

Sarah White as Museum Cleaning Woman

Liam Thomas as Museum Workman

Sam Parks as Curator

Claire Rushbrook as Eleanor Butters

Nick Pearse as Three Cups' Waiter

Victoria Elliott as Three Cups' Maid

Beatrice Curnew as Party Guest

Susie Baxter as Party Guest

Gethin Alderman as Party Guest

Robert Purdy as Party Guest

Max Dowler as Party Guest

Paul Dodds as Party Guest

John Mackay as Fine Gentleman

Mladen Petrov as David The Postman

Wendy Nottingham as Charlotte's Maid

David Juritz as Musician

Ben Hancox as Musician

James Boyd as Musician

Peter Gregson as Musician

Michael Hennessy as Garden Party Guest (uncredited)

Harvey Scrimshaw as Callow Youth (uncredited)