The legendary star, famous for his epic stand-up shows, as well as his Diddy Men and tickling stick, died just days after leaving hospital.
He married Anne Jones, his partner of 40 years, on Friday at their house, which was also the one he was born in.
His publicist Robert Holmes told the Press Association: “They got the registrar and were married in the house. He died two days later on Mother’s Day. Anne is obviously very upset.”
As news of his death broke in the early hours of Monday morning, fellow comedians and stars from the entertainment world paid tribute to Sir Ken on social media.
Born the son of a coal merchant in Knotty Ash, Liverpool, in 1927, Sir Ken made it into the Guinness Book of Records for telling 1,500 jokes in three and a half hours.
After making his name in the music halls, his career in television and radio took off.
Sir Ken spent more than six weeks in the Liverpool Heart and Chest Hospital earlier this year, following a chest infection, leaving at the end of February.
The comedy legend had this weekend been forced to cancel all his upcoming shows on his Happiness Tour, saying he needs “long term convalescence” after his spell in hospital.