Wild parties, stunning performances, silhouette erections and marrying Patrick Stewart twice. As the actor turns 80, friends including Derek Jacobi, Janet Suzman, Michael Sheen, Bill Condon and Stephen Fry pay tribute

Ian has been been very important in my life, even before we became good friends. When I was a young teen I remember watching Walter on the TV and being hugely affected by it. Then at Rada in the early 90s, I finally saw him live, in Richard III at the National. I was blown away. I remember him doing the opening speech while lighting a cigarette one-handed. It was brilliant, so understated. It exemplified his mastery – and his work ethic. To do something so difficult and complicated and make it look so easy. Ian has an innate sense of theatrical audacity, something I think he shares with Olivier. They both did things that would make the audience gasp self-consciously.