The artist died in hospital on Tuesday night (15May12) after a short illness.
Best known for his huge public works The Paper Boat and The Straw Locomotive, he was made a Member of the British Empire (MBE) for services to the arts in 2005.
His death comes in a year of celebrations of his work - his legacy was feted at The Whysman Festival in March (12) and through an archive exhibition, A Life Less Ordinary, which ran in Glasgow, Scotland until last month (Apr12).
Wyllie's daughter, Louise Wyllie, tells the BBC, ""I am so glad now that he saw the start of what is a year of celebration. He really did live a life less ordinary. There was no one else like him and I suspect there never will be.""