The author of several books, including the iconic A Brief History of Time now continues his scientific work as Director of Research at the Institute for Theoretical Cosmology at Cambridge.
Despite having to overcome serious health problems he has become the archetypal scientist of our generation and is regarded as one of the most brilliant theoretical physicists since Albert Einstein.
Hawking will mark his birthday today with a rare public lecture entitled "A Brief History of Mine" at a symposium in his honour at Cambridge.
The lecture is due to commence at 5.25pm on Sunday January 7th and will be webcast live on the symposium website.
More Hawking goodies:
Professor Hawking answers questions from BBC, Today programme Science Correspondent Tom Feilden to mark his 70th birthday.
Physicists gather at Cambridge to raise a toast to the birthday boy.
Hawking's own website.
Professor Stephen Hawking asks some big questions about our universe>>>