Yoko Ono has paid her respects to Sir George Martin.
"God bless George, the greatest music producer of all time," she says. "Peace and love to Judy, Giles and the family. Thank you for passing the great baton to the next generation of musicians. We owe you so much. Love, Yoko."
Olivia and Dhani Harrison add: "George Martin was a gentleman above all. May he rest in peace."
Sir George's aforementioned son, Giles, touchingly messages: "RIP Dad. I love you. I'm so proud to have been your son. I'll miss you more than words can say. Thank you for all the times we had together."
The word from Julian Lennon is: "The fifth Beatle, without question, and likely one of the best and most iconic music producers of all time."
Acknowledging their friendly '60s rivalry, Brian Wilson proffers: "The records that George Martin made with The Beatles were some of the greatest ever and they inspired me to greater heights. Love and mercy."
There have also been plenty of tributes from Irish admirers.
"One of the most crucially important figures in popular music, and the definition of a gent," notes Undertone Paul McLoone while Boy George also describes him as "a gentleman and legend."
"A true innovator and inspiration to all," say the Penrose boys, while Kodaline pay tribute to: "An absolute genius and inspiration."