The McFly drummer, who beat Chelsee Healey to victory on the BBC contest's final last night (December 17), explained that he wanted to pop the question in a "romantic and spontaneous" manner.
"I want to keep it as romantic and spontaneous as possible for her," he told the Sunday Mirror. "I want it to be a complete surprise.
"We moved in together right at the beginning of Strictly, so you can imagine what that was like! But we are very settled together and we talk about the future a lot."
Judd went on to reaffirm his previous claim that he couldn't wait to start a family with the violinist.
"I absolutely know 100 percent that in her I have found 'The One', and yes I do want marriage, kids, the whole deal with Izzy," he said.
Judd also admitted to being baffled by his sex symbol status.
"I really can't get my head round the whole sex symbol thing," he said. "Of course I'm flattered by it, but this Christmas I'll be slobbing out on the sofa, eating way too much and watching Christmas films. It really won't be very sexy at all."
Click through pictures of the Strictly Come Dancing final below: