Rings director Peter Jackson paid tribute to Lee on Facebook.
"I was lucky enough to work with Chris on five films all told and it never ceased to be a thrill to see him on set. I remember him saying on my 40th Birthday (he was 80 at the time), "You're half the man I am". Being half the man Christopher Lee is, is more than I could ever hope for. He was a true gentleman, in an era that no longer values gentleman.
"There will never be another Christopher Lee. He has a unique place in the history of cinema and in the hearts of millions of fans around the world," Jackson wrote.
Read his full tribute, and tributes from others, below:
Peter Jackson
Elijah Wood
An extraordinary man and life lead, Sir Christopher Lee. You were an icon, and a towering human being with stories for days. We'll miss you.