In the presence of his loved ones, he breathed his last on Saturday at a hospice in Tunbridge Wells, Kent. It was bone cancer.
From the show's inception in 2004 until its conclusion in 2016, Goodman served as its host and was well-loved by fans for his humor and biting criticism.
Between 2005 and 2022, he appeared on both Strictly and Dancing with the Stars, the US version of the programme.
"It is with great sadness that we announce that Len Goodman has passed away peacefully at the age of 78," his manager Jackie Gill said in a statement on Monday.
When the contestants got a score of seven, Goodman's rousing speech successfully turned the number into his own.
Craig Revel Horwood, the longest serving judge on Strictly, referred to Goodman as a "grand colleague and dear friend" when paying tribute on Monday.
"Len Goody Goodman is what I always used to say, and 'It's a Ten from Len and Severn' will always be with me," he declared.
Barrie Humphreys, Australian comedian best known for portraying cocky Dame Edna Everage, has died aged 89