The punk legend, whose most famous song is the anti-monarchy hit 'God Save The Queen', has published an open letter in The Sun newspaper offering the new Royal couple his best wishes.
"When I heard William had popped the question to Kate, I had a nice cup of tea for them. Later on, I might even put some Buck's Fizz in my veins in their honour," said the singer.
"This is a beautiful love story and I like that. He's done very well for himself - she's bang on the money! He got the No.1 contender."
Speaking about his change of stance on the monarchy since the 1970s, he said: "People think I hate the Royal Family, but that's not true. My animosity is towards the institution, not the people themselves. What I've always resented with the Royals was the austere nonsense that was being propagated.
"But Willy and Katy look like they are genuinely in love and that's all I look for. That's what being a human being is all about. That is what is important in life."
He added: "Oddly enough, they look like a very nice suburban couple - they do not seem ostentatious or flamboyant. They are riding a fine line of trying to please everyone. But they really do care for each other, and there's too little of that."