Eddie Redmayne
Stephen Hawking
Felicity Jones
Jane Hawking
Charlie Cox
Jonathan Hellyer Jones
Simon McBurney
Frank Hawking
David Thewlis
Dennis Sciama
Tom Prior
Robert Hawking (Age 17)
Sophie Perry
Lucy Hawking (Age 14)
Finlay Wright-Stephens
Timothy Hawking (Age 8)
Alice Orr-Ewing
Diana King
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
Anthony Skrimshire
Physicist #3
Christian McKay
Roger Penrose
Adam Godley
Senior Doctor - Cambridge Hospital
Lottie Hamilton
Robert Hawking (New Born)
Rufus Taylor
Robert Hawking (Age 2)
Delilah Sexton
Lucy Hawking (New Born)
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)
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)