Des O'Connor has died following a fall at his home in Buckinghamshire just over a week ago. Elton was among the notables remembering the comedian, singer and TV host.
He wrote on Instagram that Desmond Bernard O'Connor was ''a wonderfully kind and talented man.''
Elton, who posted an older photo of himself with Des, added, ''I always loved working with him as he was so much fun. He really brightened up the world. My condolences to his family and friends.''
Good Morning Britain's Piers Morgan described him as a ''wondrously talented, warm, funny, charming man,'' while Labour Party deputy leader Angela Rayner tweeted that he was ''a lovely man'' and ''the entertainer I saw most on telly when I was a kid growing up.''
Singer and actress Elaine Page posted that she was upset by the news. She called him a ''true gentleman'' and ''all round entertainer'' and said, ''The lights will dim in Showbizland tonight.''
The 88-year-old hosted The Des O'Connor Show from 1963-1973. He later fronted Take Your Pick in the '90s and Countdown from 2007 to 2008. He was also a vocalist who had four top 10 UK singles, including I Pretend (which went to #1), and he recorded 36 albums.
Des, who was awarded a CBE by the Queen in 2008 for his services to entertainment and broadcasting, is survived by his wife Jodie, their son Adam, and his four daughters from previous relationships, Karin, TJ, Samantha and Kristina.