Steven Spielberg

Executive Producer

Kathleen Kennedy

Executive Producer

Stephen Hawking

Self

Isobel Hawking

Self - Stephen Hawking's Mother

Janet Humphrey

Self - Stephen Hawking's Aunt

Mary Hawking

Self - Stephen Hawking's Sister

Basil King

Self - Childhood Friend

Derek Powney

Self - Oxford Classmate

Norman Dix

Actor

Robert Berman

Self - Stephen Hawking's Tutor

Gordon Berry

Actor

Roger Penrose

Actor

Dennis Sciama

Actor

John Archibald Wheeler

Actor

Brandon Carter

Actor

John R. Taylor

Actor

Kip Thorne

Actor

Don Page

Actor

Christopher Isham

Actor

Brian Whitt

Actor

Raymond Laflamme

Actor

Errol Morris

Director

Rory Johnston

Executive Producer

Gordon Freedman

Executive Producer

Colin Ewing

Executive Producer