Eddie Redmayne

Stephen Hawking

Felicity Jones

Jane Hawking

Charlie Cox

Jonathan Hellyer Jones

Emily Watson

Beryl Wilde

Simon McBurney

Frank Hawking

David Thewlis

Dennis Sciama

Maxine Peake

Elaine Mason

Harry Lloyd

Brian

Tom Prior

Robert Hawking (Age 17)

Sophie Perry

Lucy Hawking (Age 14)

Finlay Wright-Stephens

Timothy Hawking (Age 8)

Alice Orr-Ewing

Diana King

Thomas Morrison

Carter

Michael Marcus

Ellis

Gruffudd Glyn

Rees

Paul Longley

Barman - Rowing Club

Guy Oliver-Watts

George Wilde

Lucy Chappell

Mary Hawking

Charlotte Hope

Philippa Hawking

Abigail Cruttenden

Isobel Hawking

Nicholas Gerard-Martin

Physicist #1

Brett Brown

Physicist #2

Anthony Skrimshire

Physicist #3

Christian McKay

Roger Penrose

Adam Godley

Senior Doctor - Cambridge Hospital

Nicola Sloane

Bedder

Lottie Hamilton

Robert Hawking (New Born)

Enzo Cilenti

Kip Thorne

Rufus Taylor

Robert Hawking (Age 2)

Delilah Sexton

Lucy Hawking (New Born)

Eileen Davies

Eileen Bond

Simon Chandler

John Taylor

Georg Nikoloff

Khalatnikov

Oliver Payne

Robert Hawking (Age 8)

Raffiella Chapman

Lucy Hawking (Age 6)

Sam Houston

Timothy Hawking (Baby)

Victoria Emslie

Sarah (Geneva Student)

Frank Lebœuf

Swiss Doctor

Will Barton

Technician

Lucy Challenger

Female Fan

Nicola Victoria Buck

Cockcroft Guest #2

Stuart Benson

Cockcroft Guest #3

Andrew Bridgmont

Cockcroft Guest #5

Jamie Edwards

Cockcroft Guest #4

Jumaane Brown

Cockcroft Guest #1

Becky Bush

Undergraduate (uncredited)

Jon Wennington

Journalist (uncredited)